HomeMy WebLinkAboutORDINANCE 04-23
EXHIBIT A
TOWN OF ESTES PARK, COLORADO
AMENDMENTS TO THE
2021
INTERNATIONAL BUILDING CODE
INTERNATIONAL EXISTING BUILDING CODE
INTERNATIONAL FUEL GAS CODE
INTERNATIONAL MECHANICAL CODE
INTERNATIONAL PLUMBING CODE
INTERNATIONAL SWIMMING POOL AND SPA CODE
Amendments to the 2021 International Building Code,
2021 International Existing Building Code,
2021 International Fuel Gas Code,
2021 International Mechanical Code,
2021 International Plumbing Code,
2021 International Swimming Pool and Spa Code
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2021 INTERNATIONAL BUILDING CODE (IBC)
Chapter 1 Administration
The following section is hereby amended to read as follows:
101.1 Title. These regulations shall be known as the Building Code of Town of Estes Park, hereinafter referred as “this
code.”
The following section is hereby amended to read as follows:
101.2 Scope. The provisions of this code shall apply to the construction, alteration, relocation, enlargement,
replacement, repair, equipment, use and occupancy, location, maintenance, removal and demolition of every building
or structure or any appurtenances connected or attached to such buildings or structures.
Exception:
Detached one- and two-family dwellings and townhouses not more than three stories above grade plane in height with
a separate means of egress, short-term (Vacation Home) rentals, and their accessory structures not more than three
stories above grade plane in height, shall comply with this code or the International Residential Code.
The following section is hereby amended to read as follows:
101.4 Referenced Codes. The other codes specified in Sections 101.4.1 through 101.4.8 as adopted and amended by
Town of Estes Park and referenced elsewhere in this code shall be considered to be part of the requirements of this
code to the prescribed extent of each such reference.
The following section is hereby amended to read as follows:
101.4.3 Plumbing. The provisions of the International Plumbing Code shall apply to the installation, alteration, repair
and replacement of plumbing systems, including equipment, appliances, fixtures, fittings and appurtenances, and
where connected to a water or sewage system and all aspects of a medical gas system. The provisions of the most
recent edition of the Town of Estes Park On-site Wastewater Treatment System Regulations enforced by the Larimer
County Department of Health and Environmentshall apply to private sewage disposal systems.
The following section is hereby amended to read as follows:
103.1 Creation of enforcement agency. The Building Division is hereby created and the official in charge shall be
known as the building official. The function of the agency shall be the implementation, administration, and enforcement
of the provisions of this code.
The following section is hereby amended to read as follows:
103.2 Appointment. The building official shall be appointed by the Town of Estes Park Board of Trustees.
The following section is hereby amended to read as follows:
104.2.1 Determination of substantially improved or substantially damaged existing buildings and structures in
flood hazard areas. For applications for reconstruction, rehabilitation, repair, alteration, addition or other improvement
of existing buildings or structures located in flood hazard areas, the TownEngineer or their designee shall determine if
the proposed work constitutes substantial improvement or repair of substantial damage.
The following section is hereby amended to read as follows:
104.10.1 Flood hazard areas.
The Townshall not grant modifications to any provision required in flood hazard areas as established by the Town of
without the granting of a variance to such provisions if allowed and as described under the
Estes Park Land Use Code
Code.
The following section is hereby amended in its entirety to read as follows:
105. 1.1Smoke alarms. When work requiring a permit occurs within Group I-1 and R occupancies, smoke alarms
shall be installed in accordance with Section 902.2.11.
Exception: Work involving the exterior surfaces of such buildings, such as the replacement of roofing or siding, the
addition or replacement of windows or doors, or the addition of a porch or deck
.
The following section is hereby amended in its entirety to read as follows:
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105.1.2 Carbon monoxide detection. When work requiring a permit occurs within Group I-1, I-2, I-4, and R
occupancies, and within classrooms of Group E occupancies, carbon monoxide detection shall be provided in
accordance with Section 915.
Exception: Work involving the exterior surfaces of such buildings, such as the replacement of roofing or siding, the
addition or replacement of windows or doors, or the addition of a porch or deck
The following section is hereby amended to read as follows:
105.2 Work exempt from permit. Exemptions from permit requirements of this code shall not be deemed to grant
authorization for any work to be done in any manner in violation of the provisions of this code or any other laws or
ordinances of this jurisdiction. Permits shall not be required for the following:
Building:
1. One-story detached accessory structures used as tool and storage sheds, playhouses, and similar uses, provided
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that the floor area is not greater than 120 square feet (11 m)and there are no utilities installed.
2. Fences not over 7 feet (2134 mm) high.
3. Oil derricks.
a point eight feet horizontally
4. Retaining walls that are not over 4 feet (1219 mm) in height measured from
downslope from the low side finish grade to the high side finish grade behind the wall, provided that the horizontal
distance to the next uphill retaining wall is at least equal to twice the height of the upper wall unless supporting a
surcharge or impounding Class I, II or IIIA liquids. \[See Figure 105.2.4\]
5. Water tanks supported directly on grade if the capacity is not greater than 5,000 gallons (18,925 L) and the ratio
of height to diameter or width is not greater than 2:1.
6. Sidewalks and driveways not more than 30 inches (762 mm) above adjacent grade, not over any basement or
story below and not part of an accessible route.
7. Painting, papering, tiling, carpeting, cabinets, counter tops, and similar finish work.
8. Temporary motion picture, television and theater stage sets and scenery.
9. Prefabricated swimming pools accessory to a Group R-3 occupancy that are less than 24 inches (610 mm) deep,
are not greater than 5,000 gallons (18,925 L) and are installed entirely above ground.
10. Shade cloth and maximum 6 mil single layer poly-roofed structures constructed for nursery or agricultural
purposes, with no entry by the general public, not including service systems.
11. Swings and other playground equipment accessory to detached one- and two-family dwellings, including one
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elevated playhouse per lot, designed, and used exclusively for play, not exceeding 64 square feet (5.9 m) of floor
area nor 8 feet (2.44 m) in height as measured from the floor to the highest point of such structure.
12. Window awnings supported by an exterior wall that do not project more than 54 inches (1372 mm) from the
exterior wall and do not require additional support, storm windows, storm doors, and rain gutter installation.
13. Nonfixed and movable fixtures, cases, racks, counters, and partitions not over 5 feet 9 inches (1753 mm) in
height.
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14. Roofing repair or replacement work not exceeding one square (100 square feet (9.29 m)) of covering per
building.
15. Decorative fountains and pools which cannot contain water more than twenty-four (24) inches (610 mm) deep.
Gas:
1. Portable heating appliance.
2. Replacement of any minor part that does not alter approval of equipment or make such equipment unsafe.
Mechanical:
1. Portable heating appliance.
2. Portable ventilation equipment.
3. Portable cooling unit.
4. Steam, hot or chilled water piping within any heating or cooling equipment regulated by this code.
5. Replacement of any part that does not alter its approval or make it unsafe.
6. Portable evaporative cooler.
7. Self-contained refrigeration system containing 10 pounds (4.54 kg) or less of refrigerant and actuated by motors
of 1 horsepower (0.75 kW) or less.
8. Portable fuel cell appliances that are not connected to a fixed piping system and are not interconnected to a
power grid.
Plumbing:
1. The stopping of leaks in drains, water, soil, waste or vent pipe, provided, however, that if any concealed trap,
drainpipe, water, soil, waste or vent pipe becomes defective and it becomes necessary to remove and replace the
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same with new material, such work shall be considered as new work and a permit shall be obtained and inspection
made as provided in this code.
2. The clearing of stoppages or the repairing of leaks in pipes, valves or fixtures and the removal and reinstallation of
plumbing fixtures, provided that such repairs do not involve or require the replacement or rearrangement of valves,
pipes or fixtures.
FIGURE 105.2.4 RETAINING WALL PERMIT EXEMPTIONS
The following section is hereby amended to read as follows:
105.3.2 Time limitation of application. An application for a permit for any proposed work shall be deemed to have
been abandoned 180 days after the date of filing, unless such application has been pursued in good faith or a permit
has been issued. The building official is authorized to grant one or more extensions of time for additional periods not
exceeding 180 days each. The extension shall be requested in writing and justifiable cause demonstrated.
The following section is hereby amended to read as follows:
107.3.1 Approval of construction documents. When the building official issues a permit, the construction
documents shall be approved, in writing, electronically or by stamp, indicating the approved permit number. One set of
construction documents so reviewed shall be retained by the building official. The other set shall be returned to the
applicant, shall be kept at the site of work and shall be open to inspection by the building official or a duly authorized
representative.
The following section is hereby added to read as follows:
109.7 Re-inspections. A re-inspection fee may be assessed for each inspection or re-inspection when access to the
work is not provided on the date for which inspection is requested, a readily visible address is not posted, the
inspection record card is not posted or otherwise available on site, the approved plans are not readily available in a
visible location for the inspector, such portion of work for which inspection is called for is not complete, corrections
called for are not made, work deviates from plans approved by the building official, or for other good and sufficient
cause as determined by the building official. To obtain a re-inspection, the applicant shall pay the re-inspection fee in
accordance with the adopted Town of Estes Park fee schedule. When re-inspection fees have been assessed, no
additional inspection of the work will be performed until the required fees have been paid.
The following section is hereby added to read as follows:
110.3.2.1 Underground inspection. Underground inspections shall be made after trenches or ditches are excavated
Where
and bedded, piping, tubing, ducts, and electrical wiring is installed, and before backfill is put in place.
excavated soil contains rocks, broken concrete, frozen chunks, and other rubble that would damage or break the
piping or cause corrosive action, clean backfill shall be on the job site.
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The following section is hereby amended to read as follows:
110.3.4 Frame inspection. Framing inspections shall be made after the roof deck or sheathing, all framing,
fireblocking, and bracing are in place and pipes, chimneys, vents rough electrical, plumbing, heating, pipes and ducts
to be concealed are complete.
The following section is hereby added to read as follows:
110.3.4.1 Rough-in inspections. Rough-in inspections shall be made after the roof, framing, fireblocking,
firestopping, draftstopping and bracing is in place, chimneys, vents, electrical, plumbing, heating, pipes, and ducts, are
roughed-in, and prior to the installation of insulation, wall, or ceiling membranes.
The following section is hereby amended to read as follows:
110.3.9 Energy efficiency inspections. Inspections shall be made to determine compliance with Chapter 13 and
shall include, but not be limited to, inspections for footing, foundation, slab and thermal envelope insulation R- and
Uvalues, fenestration U-value, duct system R-value, HVAC and water-heating equipment efficiency, air sealing,
plumbing protection, lighting system controls, components and meters, installation and proper operation of all required
building controls, and documentation verifying activities associated with required building commissioning in
accordance with Section C408.
The following section is added to read as follows:
110.7 Testing. Plumbing, fuel gas, mechanical, and systems shall be tested as required in applicable codes and in
accordance with Sections 110.7.1 through 110.7.3. Tests shall be made by the permit holder and observed by the
code official.
The following section is added to read as follows:
110.7.1.1 New, altered, extended, or repaired systems. New plumbing, fuel gas, mechanical,and parts of existing
systems that have been altered, extended, renovated, or repaired shall be tested as prescribed herein to disclose
leaks and defects, except that testing is not required in the following cases:
The following section is added to read as follows:
110.7.2 Equipment, material, and labor for system tests. Equipment, material, and labor required for testing a
plumbing, fuel gas, and mechanical systems or part thereof shall be furnished by the permit holder.
The following section is added to read as follows:
110.7.3 Reinspection and testing. Where any work or installation does not pass any initial test or inspection, the
necessary corrections shall be made to comply with this code. The work or installation shall then be resubmitted to the
code official for inspection and testing.
The following section is hereby amended to read as follows:
111.1 Change of occupancy. A building or structure shall not be used or occupied in whole or in part, and a change
of occupancy of a building or structure or portion thereof shall not be made, until the building official has issued a
certificate of occupancy therefor as provided herein. Issuance of a certificate of occupancy shall not be construed as
an approval of a violation of the provisions of this code or of other ordinances of the jurisdiction. Certificates presuming
to give authority to violate or cancel the provisions of this code or other ordinances of the jurisdiction shall not be valid.
Exceptions:
1. Certificates of occupancy are not required for work exempt from permits in accordance with Section 105.2.
2. Shell, agricultural and accessory buildings and miscellaneous permits shall not receive certificates of occupancy;
a letter of completion will be issued upon request.
The following section is hereby amended to read as follows:
111.2 Certificate issued. After the building official inspects the building or structure and does not find violations of the
provisions of this code or other laws that are enforced by the department, the building official shall issue a certificate of
occupancy that may contain the following:
1. The permit number.
2. The address of the structure.
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3. The name and address of the owner or the owner’s authorized agent.
4. A description of that portion of the structure for which the certificate is issued.
5. A statement that the described portion of the structure has been inspected for compliance with the requirements
of this code.
6. The name of the building official.
7. The edition of the code under which the permit was issued.
8. The use and occupancy, in accordance with the provisions of Chapter 3.
9. The type of construction as defined in Chapter 6.
10. The design occupant load.
11. Where an automatic sprinkler system is provided, whether the sprinkler system is required.
12. Any special stipulations and conditions of the building permit.
The following section is hereby amended to read as follows:
111.3 Temporary occupancy. The building official is authorized to issue a temporary certificate of occupancy before
the completion of the entire work covered by the permit, provided that such portion or portions shall be occupied
safely. A Temporary Certificate of Occupancy (TCO) shall be valid for 180 90 days and may be extended by the
Building Official. The fee for each TCO shall be in accordance with the fee schedule as established by Town of Estes
Park.
The following section is hereby amended to read as follows:
113.4 Administration. To appeal a written determination of the building official to the Board of Appeals, a written
appeal must be received by the building official within thirty (30) days of the date of the determination being appealed.
The appellant shall, at the time of making such appeal, pay to the Town of Estes Park Building Division an appeal fee
as specified in the Town of Estes Park fee schedule. The building official shall send written notice of hearing to all
parties concerned at least fourteen (14) days prior to the hearing by mailing the same to such parties' last known
address by regular mail. All meetings or hearings shall be open to the public. The Board of Appeals shall, from time to
time, adopt such additional rules and regulations as it deems necessary and advisable for the conduct of its hearings
and for carrying out the provisions hereof. The building official shall take immediate action in accordance with the
decision of the Board of Appeals.
Chapter 2 Definitions
The following section is hereby amended by adding definitions to read as follows:
202 DEFINITIONS
FACTORY-BUILT FIREPLACE. A listed assembly of a fire chamber, its chimney and related factory-made parts
designed for unit assembly without requiring field construction. Factory-built fireplaces are not dependent on
mortarfilled joints for continued safe use.
FIREPLACE INSERT. A wood burning device designed to be installed in an existing fireplace.
INTERNATIONAL FIRE CODE. The International Fire Code as adopted, amended, and administered by and within a
fire district.
LARGE SHORT-TERM (VACATION HOME) RENTAL. A dwelling constructed in compliance with the International
Residential Code, where transient accommodations are provided for a single group of more than 10 occupants and
where rooms may not be individually rented to guests who are not part of the group.
RESORT LODGE COTTAGE(S) - A building or group of buildings, under single management and ownership,
containing rooms and/or dwelling units available for temporary rental to guests where the primary attraction is
generally recreational features or activities.
SHORT-TERM (VACATION HOME) RENTAL. A dwelling constructed in compliance with the International Residential
Code, where transient accommodations are provided for a single group of ten or fewer occupants and where rooms
may not be individually rented to guests who are not part of the group.
SOLIDLY SHEATHED DECK.A roof deck with gaps between planks or sheathing not exceeding 1/8 inch (3.18 mm).
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WOOD STOVE: An appliance designed for or capable of burning wood and capable of and intended for domestic
space heating or domestic water heating.
Chapter 3 Use and Occupancy Classification
The following section is hereby amended to read as follows:
305.2.3 Children in a dwelling unit. A facility such as the above within a dwelling unit having children receiving such
day care shall be classified as a Group R-3 occupancy or shall comply with the International Residential Code.
The following section is hereby amended to read as follows:
310.2 Residential Group R-1. Residential Group R-1 occupancies containing sleeping units where the occupants are
primarily transient in nature, including:
Boarding houses (transient) with more than 10 occupants
Congregate living facilities (transient) with more than 10 occupants
Hotels (transient)
Motels (transient)
Large Short-term (Vacation Home) Rentals
Resort Lodge Cottages with more than 10 occupants.
Exceptions:
1. Short-term (Vacation Home) rentals shall comply with this code or the International Residential Code.
2. Resort lodge cottages not exceeding 10 occupants shall comply with this code or the International Residential
Code.
The following section is hereby amended to read as follows:
310.3 Residential Group R-2. Residential Group R-2 occupancies containing sleeping units or more than two
dwelling units where the occupants are primarily permanent in nature, including:
Apartment houses
Congregate living facilities (nontransient) with more than 16 occupants
Boarding houses (nontransient)
Convents
Dormitories
Fraternities and sororities
Monasteries
Hotels (nontransient) Live/work units
Motels (nontransient) Vacation timeshare properties Exceptions:
1. Short-term (Vacation Home) rentals shall comply with this code or the International Residential Code.
2. Resort lodge cottages not exceeding 10 occupants shall comply with this code or the International Residential
Code.
The following section is hereby amended to read as follows:
310.4.1 Care facilities within a dwelling. Care facilities for five or fewer persons receiving care that are within a
single-family dwelling are permitted to comply with the International Residential Code provided an automatic sprinkler
system is installed in accordance with Section 903.3.1.3. Day care facilities for children within a dwelling unit shall be
classified as a Group R-3 occupancy or shall comply with the International Residential Code.
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310.4.2 Lodging houses. Owner-occupied lodging houses with five or fewer guest rooms and 10 or fewer total
occupants shall be permitted to be constructed in accordance with the International Residential Code.
The following section is hereby amended to read as follows:
311.1.1 Accessory storage spaces. A room or space used for storage purposes that is accessory to another
occupancy and not more than 25% of the square footage of that occupancy shall be classified as part of that
occupancy.
Chapter 5 General Building Heights and Areas
The following section is hereby added to read as follows:
502.2 Premises Identification During Construction. The approved permit number and street address number shall
be displayed and be plainly visible and legible from the public street or road fronting the property on which any
building is being constructed or remodeled.
The following section is hereby amended to read as follows:
508.5 Live/work units. A live/work unit shall comply with Sections 508.5 through 508.5.11.
Exception: Dwelling or sleeping units that include an office that is less than 20 percent of the area of the dwelling unit
are permitted to be classified as dwelling units with accessory occupancies in accordance with Section 508.2.
Chapter 9 Fire Protection Systems
The following section is hereby amended to read as follows:
902.1 Pump and rise room size. Where provided, fire pump rooms and automatic sprinkler system riser rooms shall
be designed with adequate space for all equipment necessary for the installation, as defined by the manufacturer,
with sufficient working room around the stationary equipment. Clearances around equipment to elements of
permanent construction, including other installed equipment and appliances, shall be sufficient to allow inspection,
service, repair, or replacement without removing such elements of permanent construction or disabling the function of
a required fire-resistance-rated assembly. Fire pump and automatic sprinkler system riser rooms shall be provided
with doors and unobstructed passageways large enough to allow removal of the largest piece of equipment and no
less than 32” (813 mm) net clear width.
This section is hereby amended to read as follows:
903.2.1.1 Group A-1. An automatic sprinkler system shall be provided throughout stories containing Group A-1
occupancies and throughout all stories from the Group A-1 occupancy to and including the levels of exit discharge
serving that occupancy where one of the following conditions exists:
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1. The fire area exceeds 5,000 square feet (464.5 m).
2. The fire area has an occupant load of 300 or more.
3. The fire area is located on a floor other than a level of exit discharge serving such occupancies.
4. The fire area contains a multitheater complex.
This section is hereby amended to read as follows:
903.2.1.3 Group A-3. An automatic sprinkler system shall be provided throughout stories containing Group A-3
occupancies and throughout all stories from the Group A-3 occupancy to and including the levels of exit discharge
serving that occupancy where one of the following conditions exists:
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1. The fire area exceeds 5,000 square feet (464.5 m).
2. The fire area has an occupant load of 300 or more.
3. The fire area is located on a floor other than a level of exit discharge serving such occupancies.
This section is hereby amended to read as follows:
903.2.1.4 Group A-4. An automatic sprinkler system shall be provided throughout stories containing Group A-4
occupancies and throughout all stories from the Group A-4 occupancy to and including the levels of exit discharge
serving that occupancy where one of the following conditions exists:
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1. The fire area exceeds 5,000 square feet (464.5 m).
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2. The fire area has an occupant load of 300 or more.
3. The fire area is located on a floor other than a level of exit discharge serving such occupancies.
The following section is hereby added to read as follows:
903.2.2.1 Group B. An automatic sprinkler system shall be provided for fire areas containing Group B occupancies
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).
when the fire area exceeds 5,000 square feet (464.5 m
The following section is hereby amended to read as follows:
903.2.2.2 Ambulatory care facilities.
An automatic sprinkler system shall be installed throughout the entire floor containing an ambulatory care facility
where either of the following conditions exist at any time: 1. Four or more care recipients are incapable of self-
preservation.
2. One or more care recipients that are incapable of self-preservation are located at other than the level of exit
discharge serving such a facility.
In buildings where ambulatory care is provided on levels other than the level of exit discharge, an automatic sprinkler
system shall be installed throughout the entire floor as w ell as all floors below where such care is provided, and all
floors between the level of ambulatory care and the nearest level of exit discharge, the level of exit discharge, and
all floors below the level of exit discharge.
Exception: Floors classified as an open parking garage are not required to be sprinklered.
The following section is hereby amended to read as follows:
903.2.3 Group E. An automatic sprinkler system shall be provided for Group E occupancies as follows:
2
) in area.
1. Throughout all Group E fire areas greater than 5,000 square feet (464.5 m
2. The Group E fire area is located on a floor other than a level of exit discharge serving such occupancies.
Exception: In buildings where every classroom has not fewer than one exterior exit door at ground level, an
automatic sprinkler system is not required in any area below the lowest level of exit discharge serving that area.
3. The Group E fire area has an occupant load of 300 or more.
This section is hereby amended to read as follows:
903.2.4 Group F-1. An automatic sprinkler system shall be provided throughout all buildings containing a Group F-1
occupancy where one of the following conditions exist:
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1. A Group F-1 fire area exceeds 5,000 square feet (464.5 m).
2. A Group F-1 fire area is located more than three stories above grade plane.
3. The combined area of all Group F-1 fire areas on all floors, including any mezzanines, exceeds 24,000 square
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feet (2230 m).
A new section is hereby added to read as follows:
903.2.4.2 Group F-2. An automatic sprinkler system shall be provided throughout all buildings containing a Group F2
occupancy where one of the following conditions exist:
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1. A Group F-2 fire area exceeds 5,000 square feet (464.5 m).
2. A Group F-2 fire area is located more than three stories above grade plane.
The following section is hereby amended to read as follows:
903.2.6 Group I. An automatic sprinkler system shall be provided throughout buildings with a Group I fire area.
Exceptions:
1. An automatic sprinkler system is not required where Group I-4 day care facilities are at the level of exit discharge
and where every room where care is provided has not fewer than one exterior exit door and the fire area does
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not exceed 5,000 square feet (464.5 m).
2. In buildings where Group I-4 day care is provided on levels other than the level of exit discharge, an automatic
sprinkler system in accordance with Section 903.3.1.1 shall be installed on the entire floor where care is
provided, all floors between the level of care and the level of exit discharge, and all floors below the level of exit
discharge other than areas classified as an open parking garage.
The following section is hereby amended to read as follows:
903.2.7 Group M. An automatic sprinkler system shall be provided throughout buildings containing a Group M
occupancy where one of the following conditions exists:
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1. A Group M fire area exceeds 5,000 square feet (464.5 m).
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2. A Group M fire area is located more than three stories above grade plane.
3. The combined area of all Group M fire areas on all floors, including any mezzanines, exceeds 24,000 square feet
2
(2230 m).
The following section is hereby amended to read as follows:
903.2.9 Group S-1. An automatic sprinkler system shall be provided throughout all buildings containing a Group S-1
occupancy where one of the following conditions exists:
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1. A Group S-1 fire area exceeds 5,000 square feet (464.5 m)
2. A Group S-1 fire area is located more than three stories above grade plane.
3. The combined area of all Group S-1 fire areas on all floors, including any mezzanines, exceeds 24,000 square
2
feet (2230 m).
4. A Group S-1 fire area used for the storage of commercial motor vehicles where the fire area exceeds 5,000
2
square feet (464.5 m).
The following section is hereby amended to read as follows:
903.2.9.1 Repair garages.
An automatic sprinkler system shall be provided throughout all buildings used as repair garages in accordance with
Section 406, as shown:
1. Buildings having two or more stories above grade plane, including basements, with a fire area containing a repair
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garage exceeding 5,000 square feet (464.5 m).
2. Buildings not more than one story above grade plane, with a fire area containing a repair garage exceeding
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5,000 square feet (464.5 m).
3. Buildings with repair garages servicing vehicles parked in basements.
4. A Group S-1 fire area used for the repair of commercial motor vehicles where the fire area exceeds 5,000 square
2
feet (464.5 m).
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The following section is hereby amended to read as follows:
903.2.10 Group S-2. An automatic sprinkler system shall be provided throughout buildings containing a Group S-2
occupancy where any of the following conditions exists:
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1. Where the Group S-2 fire area exceeds 5,000 square feet (464.5 m).
2. Where an enclosed parking garage in accordance with Section 406.6 is located beneath other groups.
Exception:Enclosed parking garages located beneath Group R-3 occupancies.
3. Where the fire area of an open parking garage in accordance with Section 406.5 exceeds 48,000 square feet
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(4460 m).
4. Where a Group S-2 fire area is located more than three stories above grade plane.
The following section is hereby amended to read as follows:
903.2.11.1.3 Basements. Where any portion of a basement is located more than 75 feet (22,860 mm) from openings
required by Section 903.2.11.1, the basement shall be equipped throughout with an approved automatic sprinkler
system.
The following section is hereby amended by adding item #5 to read as follows:
903.3.1.2.3 Attics.
5. In buildings of other than R-3 occupancy containing dwelling or sleeping units.
Exceptions:
1. Where the building contains not more than 6 individual dwelling units or sleeping units, which are separated
from each other by minimum 1-hour fire barriers.
2. Where the building contains not more than 12 individual dwelling units or sleeping units, which are
separated into fire areas containing no more than 6 individual dwellings units (complying with number 1
above) by a minimum 2-hour fire wall.
The following section is hereby amended to read as follows:
907.2.11 Single- and multiple-stations smoke alarms. Listed single and multiple station smoke alarms complying
with UL 217 shall be installed in accordance with sections 907.2.11.1 through 907.2.11.7 and NFPA 72. Where one
or more sleeping rooms are added or created in existing Group R Occupancies, the entire building shall be provided
with smoke detectors located and installed as required for new Group R Occupancies described herein.
Chapter 10 Means of Egress
The following section is hereby amended and exceptions 7 and 8 are added to read as follows:
1010.1.4 Floor elevation. There shall be a floor or landing on each side of a door. Such floor or landing shall be at
the same elevation on each side of the door. Landings shall be level except for exterior landings, which are permitted
to have a slope not to exceed 0.25 unit vertical in 12 units horizontal (2-percent slope). All exterior steps, slabs,
walks, decks, and patios serving as exterior door landings or exterior stairs shall be adequately and permanently
secured in place by approved methods to prevent such landings or stairs from being undermined or subject to
significant displacement due to improper placement of supporting backfill or due to inadequate anchoring methods.
EXCEPTIONS:
7. Exterior doors serving individual dwelling units, other than the main entrance door to a dwelling unit, may open at
one intervening exterior step that is equally spaced between the interior floor level above and exterior landing below,
provided that the step has a minimum tread depth of 12 inches (305 mm), a maximum riser height of 7 ¾ inches
(196.8mm), a minimum width equal to the door width, and further provided that the door does not swing over the step.
The following section is hereby amended to read as follows (the exceptions are unchanged):
1011.11 Handrails. Flights of stairways of more than 1 riser shall have handrails on each side and shall comply with
Section 1014. Where glass is used to provide the handrail, the handrail shall also comply with Section 2407.
The following section is hereby amended to read as follows:
1015.8 Window openings. Windows in Group R-2 and R-3 buildings including dwelling units, where the top of the sill
of an operable window opening is located less than 24 inches (610 mm) above the finished floor and more than 72
inches (1829 mm) above the finished grade or other surface below on the exterior of the building, shall comply with
one of the following:
11
The following section is hereby added to read as follows:
1015.9 Below grade openings. All area wells, stair wells and light wells attached to any building that are located
less than thirty-six (36) inches (914.4 mm) from the nearest intended walking surface and deeper than thirty (30)
inches (762 mm) below the surrounding ground level, creating an opening greater than twenty-four (24) inches (610
mm) measured perpendicular from the building and with side walls of such well having a slope steeper than two
horizontal to one vertical, shall be provided with guards complying with section around the entire opening, or be
provided with an equivalent barrier. An intended walking surface is a sidewalk, pathway, patio slab, deck or similar
element.
EXCEPTIONS:
1. Guards are not required on the access side of stairways.
2. Area wells provided for emergency escape and rescue openings may be protected with grilles or covers
complying with Section 1031.6 of this code.
3. Grilles or covers may be placed over stairways and other openings used exclusively for service access.
The following section is hereby amended to read as follows:
1031.2 Where required. In addition to the means of egress required by this chapter, emergency escape and rescue
openings shall be provided in the following occupancies:
1. Group R-2 occupancies located in stories with only one exit or access to only one exit as permitted by Tables
1006.3.4(1) and 1006.3.4(2).
2. Group R-3 and R-4 occupancies.
Basements, sleeping rooms, habitable lofts, and mezzanines below the fourth story above grade plane shall have not
fewer than one emergency escape and rescue opening in accordance with this section. Where basements contain
one or more sleeping rooms, an emergency escape and rescue opening shall be required in each sleeping room but
shall not be required in adjoining areas of the basement. Such openings shall open directly into a public way or to a
yard or court that opens to a public way.
Exceptions:
1. Basements with a ceiling height of less than 80 inches (2032 mm) shall not be required to have emergency
escape and rescue openings.
2. Emergency escape and rescue openings are not required from basements or sleeping rooms that have an exit
door or exit access door that opens directly into a public way or to a yard, court or exterior egress balcony that
opens to a public way.
2
3. Basements without habitable spaces and having not more than 200 square feet (18.6 m) in floor area shall not
be required to have emergency escape and rescue openings.
4. Storm shelters are not required to comply with this section where the shelter is constructed in accordance with
ICC 500.
The following section is hereby amended to read as follows:
1031.3.2 Minimum dimensions. The minimum net clear opening height dimension shall be 24 inches (610 mm). The
minimum net clear opening width dimension shall be 20 inches (508 mm). The net clear opening dimensions shall be
the result of normal operation of the opening, with casement windows measured when open perpendicular to the
exterior wall.
The following section is hereby amended by adding Exception #2 to read as follow:
1031.5.3 Drainage. Area wells shall be designed for proper drainage by connecting to the building’s foundation
drainage system required by Section 1805.
Exception:
1. A drainage system for area wells is not required where the foundation is on well-drained soil or sand-gravel
mixture soils in accordance with the United Soil Classification System, Group I Soils, in accordance with Section
1803.5.1.
2. A drainage system is not required for new window wells on additions to existing dwellings where no foundation
drainage system exists.
Chapter 11 Accessibility
The following section is hereby amended to read as follows:
1108.6 Group R. Accessible units, Type A units and Type B units shall be provided in Group R occupancies in
accordance with Sections 1108.6.1 through 1108.6.4. Group R occupancies shall be provided with accessible
dwelling units, guest rooms and other elements as specified in the 2003 Colorado Revised Statutes Title 9 Article 5
Section 105 or as subsequently amended by statute.
12
Chapter 14 ExteriorWalls
The following section is hereby amended to read as follows:
1402.6 Flood resistance. For buildings in flood hazard areas as established in Section 1612.3, building construction
shall comply with the requirements of the Town of Estes Park Land Use Code.
The following section is hereby added to read as follows:
1403.9.1 Vinyl siding on new buildings. Vinyl sidings on new buildings shall be installed over one-hour fire-rated
assemblies listed for exterior fire exposure, in both the vertical and horizontal plane.
The following section is hereby added to read as follows:
1403.12.3 Polypropylene siding on new buildings. Polypropylene on new buildings shall be installed over onehour
fire-rated assemblies listed for exterior fire exposure, in both the vertical and horizontal plane.
Chapter 15 Roof Assemblies and Rooftop Structures
The following section is hereby amended to read as follows:
1502.1 General. All buildings shall have a controlled method of water disposal from roofs that will collect and
discharge roof drainage to the ground surface at least 5 feet (1524 mm) from foundation walls or to an approved
drainage system. Design and installation of roof drainage systems shall comply with this section, Section 1611 of this
code and Chapter 11 of the International Plumbing Code.
The following section is hereby added to read as follows:
1504.8.1 Impact resistance of asphalt shingles. Asphalt shingles shall be Class 4 impact resistant, tested in
accordance with UL 2218 and installed in accordance with the manufacturer’s installation instructions.
Exceptions
1. When an owner wishes to replace existing asphalt shingles that are less than class 4 impact resistant with tiles of
a similar color or tile, and there are no class 4 impact resistance shingles available of similar color or style, the
building official may approve alternate materials that are less than class 4 impact resistant, so long as the
replacement shingles are the highest class of impact resistance available that match the color or style of the
existing shingles. If no impact resistant materials are available, the building official may approve non-impact
resistant shingles that meet all other applicable requirements of this code.
2. For repairs or additions to existing asphalt singles that are less than class 4 impact resistant, the owner may use
the same or similar materials regardless of impact resistance of the new shingles.
The following section is hereby amended to read as follows:
1505.1 General. Roof assemblies shall be divided into the classes defined in this section. Class A, B and C roof
assemblies and roof coverings required to be listed by this section shall be tested in accordance with ASTM E108 or
UL 790. In addition, fire-retardant-treated wood roof coverings shall be tested in accordance with ASTM D2898.
Except as otherwise allowed, roofs shall be covered with materials listed as Class A.
Exceptions:
1. Skylights and sloped glazing that comply with Chapter 24 or Section 2610.
2. Noncombustible roof coverings as defined in Section 1507.3, 1507.4, and 1507.5 may be applied in accordance
with the manufacturer's specifications in place of a fire-retardant roofing assembly.
3. Any Class B or Class C roof covering may be installed on any new construction that is added to an existing
building classified as a Group R, Division 3 or Group U Occupancy containing Class B or Class C roof covering,
provided the roof extremities of such existing building and new construction are located a minimum distance of 5
feet from the nearest adjacent property line and a minimum distance of 10 feet (3048 mm) from any other
building. Any roof covering shall have a minimum rating of Class B for buildings located in the Wildfire Hazard
Area and a minimum rating of Class C outside the Wildfire Hazard Area.
Table 1505.1 “Minimum Roof Covering Classifications for Types of Construction” is hereby deleted.
The following section is hereby amended to read as follows:
1505.9 Rooftop mounted photovoltaic (PV) panel systems. Rooftop mounted photovoltaic (PV) panel systems
shall be tested, listed, and identified with a fire classification in accordance with UL 2703. Listed systems shall be
13
installed in accordance with the manufacturer’s installation instructions and their listing. The fire classification shall
comply with Section 1505.1 based on the type of construction of the building.
The following section is hereby amended to read as follows:
1507.1.2 Ice barriers An ice barrier shall be installed for asphalt shingles, metal roof shingles, mineral-surfaced roll
roofing, slate and slate-type shingles, wood shingles, and wood shakes. The ice barrier shall consist of not less than
two layers of underlayment cemented together, or a self-adhering polymer modified bitumen sheet shall be used in
place of normal underlayment and extend from the lowest edges of all roof surfaces to a point not less than 24 inches
(610 mm) inside the exterior wall line of the building.
Exception:Detached accessory structures that do not contain conditioned floor area.
The following section is hereby amended to read as follows:
1511.2.3 Weather protection. Provisions such as louvers, louver blades or flashing shall be made to protect the
mechanical and electrical equipment and the building interior from the elements. Mechanical units, ducts, piping, or
structures installed or replaced on roofs shall be being properly supported by curbs, pads, bases, or piers which shall
be flashed to the roofing in a watertight manner. All unsupported sections of mechanical equipment shall be a
minimum of twelve (12) inches (304.8 mm) above the plane of the roof so that they will not obstruct the re-roofing
process. Mechanical units shall properly connect to heating, air handling, refrigeration, and ventilation equipment,
including fans, blowers, and similar types of equipment. Units shall be so located that proper drainage from the roof
will not be blocked or impeded. Roof openings surrounded by curbs shall be sheathed over solidly and covered with a
minimum of twenty-six (26) gauge metal approved for the use, or of equal material. All seams and mitered corners
shall be constructed in a watertight manner. Such curbs shall be a minimum of nine (9) inches (228.6 mm) in height.
The following section is hereby amended to read as follows:
1512.1 General. Materials and methods of application used for recovering or replacing an existing roof covering shall
comply with the requirements of Chapter 15 and Section 1202.2. No portion of an existing nonrated roof covering
may be permanently replaced or covered with more than one square of nonrated roof covering. Any existing roof
covering system may be replaced with a roof covering of the same materials and classification, provided the
replacement roof covering has a minimum rating of Class B for buildings located in the Wildfire Hazard Area and a
minimum rating of Class C outside the Wildfire Hazard Area.
Chapter 16 Structural Design
The following section is hereby amended to read as follows:
1602.1 Notations. The following notations are used in this chapter:
D = Dead load.
D = Weight of ice in accordance with Chapter 10 of ASCE 7.
i
E = Combined effect of horizontal and vertical earthquake induced forces as defined in Section 12.4 of ASCE
7.
F = Load due to fluids with well-defined pressures and maximum heights.
F = Flood load in accordance with Chapter 5 of ASCE 7.
a
H = Load due to lateral earth pressures, ground water pressure or pressure of bulk materials.
L = Live load.
L = Roof live load.
r
R = Rain load.
S = Snow load.
T = Cumulative effects of self-straining load forces and effects.
V = Allowable stress design wind speed, miles per hour (mph) (km/hr) where applicable.
asd
V = Basic design wind speeds, miles per hour (mph) (km/hr) determined in accordance with Section 1609.3.
W = Load due to wind pressure.
W = Wind-on-ice in accordance with Chapter 10 of ASCE 7.
i
The following section is hereby amended by amending Exception #7 to read as follows:
1603.1 General Construction
Exception: Construction documents for buildings constructed in accordance with the conventional light-frame
construction provisions of Section 2308 shall indicate the following structural design information:
1. Floor and roof dead and live loads.
14
2. Ground snow load, P.
g
3. Basic design wind speed, V, miles per hour (mph) (km/hr) and allowable stress design wind speed, V
, as
asd
determined in accordance with Section 1609.3.1 and wind exposure.
4. Seismic design category and site class.
5. Flood design data, if located in flood hazard areas established in Section 1612.3.
6. Design load-bearing values of soils.
7. Risk category.
The following section is hereby amended by amending Exception #7 to read as follows:
1603.1.3 Roof snow load data. The ground snow load, P, shall be indicated. The following additional information
g
shall also be provided, regardless of whether snow loads govern the design of the roof:
1. Flat-roof snow load, P
.
f
2. Snow exposure factor, C.
e
3. Snow load importance factor, I.
s
4. Thermal factor, C.
t
5. Slope factor(s), C.
s
2
6. Drift surcharge load(s), P, where the sum of P and Pexceeds 20 psf (0.96 kN/m).
dd f
7. Width of snow drift(s), W
The following entry in Table 1604.5 is hereby amended to read as follows (remainder of table unchanged):
TABLE 1604.5 RISK CATEGORY OF BUILDINGS AND OTHER STRUCTURES
RISK CATEGORY NATURE OF OCCUPANCY
III Power-generating stations, communications towers and facilities, water treatment
facilities for potable water, wastewater treatment facilities and other public utility facilities not included in Risk
Category IV.
The following section is amended to read as follows:
1608.2 Ground Snow Loads.
The design ground snow load shall comply with the Colorado Design Snow Loads Report and Map, published by the
Structural Engineers Association of Colorado (dated May 6, 2015) or the table below. The design roof snow load
values shall be determined from Section 1608 of the IBC, including all applicable factors, and loading and drifting
considerations of ASCE 7, Chapter 7, but in no case shall the final design roof snow load be less than a uniformly
distributed load of 30 psf.
EXCEPTION: Greenhouses may take the full load reductions allowed per ASCE 7.
Ground Elevation does Ground Snow Load
Ground Snow Load Table Notes:
not exceed (feet) P (psf)
g
Ground snow load (P) may be linearly interpolated
g
5,000 35
between tabulated values.
6,000 45
For ground 6,500 50 elevations above 10,000 feet, the ground
snow load (Pg) shall be determined from the Colorado Design
7,000 60
Snow Loads Report and Map published by the Structural
8,000 70
Engineers Association of Colorado (dated May 6, 2015).
9,000 100
10,000 140
The following section is hereby amended to read as follows:
1609.3 Basic Design Wind Speed.
The basic design wind speed, V, in mph, for the determination of site wind loads shall comply with the Colorado
Front Range Gust Map – ASCE 7-10 Compatible, published by the Structural Engineers Association of Colorado
(dated November 18, 2013) or the Larimer County Basic Design Wind Speed Map
15
The following section is hereby amended to read as follows:
1609.4 Exposure category. For each wind direction considered, an exposure category that adequately reflects the
characteristics of ground surface irregularities shall be determined for the site at which the building or structure is to
be constructed. Account shall be taken of variations in ground surface roughness that arise from natural topography
and vegetation as well as from constructed features. Wind exposure category shall be Exposure C unless designated
otherwise by the design professional based on site-specific conditions and approved by the building official.
The following section is hereby amended to read as follows:
1612.1 General. Within flood hazard areas as established by the Town of Estes Park Land Use Code, all new
construction of buildings, structures and portions of buildings and structures, including substantial improvement and
repair of substantial damage to buildings and structures, shall be designed, and constructed to resist the effects of
flood hazards and flood loads. For buildings that are located in more than one flood hazard area, the provisions
associated with the most restrictive flood hazard area shall apply. Building construction within the flood hazard area
shall comply with the requirements of the Town of Estes Park Land Use Code.
The following sections are hereby deleted in their entirety:
1612.2 Design and construction.
1612.3 Establishment of flood hazard areas.
1612.4 Flood hazard documentation.
The following section is amended to read as follows:
1613.2 Seismic ground motion values. Except as noted below, seismic ground motion values shall be determined
in accordance with this section. Site-specific seismic design values shall be determined from the USGS website
https://earthquake.usgs.gov/hazards/designmaps/
For Risk Categories I & II, the following values may be used for design:
0.2 second spectral response acceleration S = 0.229g, Site Class D, Seismic Design Category B
s
1.0 second spectral response acceleration S = 0.068g, Site Class D, Seismic Design Category B
1
The following section is hereby amended to read as follows:
1614.1 General. Ice-sensitive structures shall be designed for ½ inch (12.7 mm) atmospheric ice loads (D) in
i
accordance with Chapter 10 of ASCE 7.
16
Chapter 18
Soils and Foundations
The following section is hereby amended to read as follows:
1809.5 Frost protection. Except where otherwise protected from frost, foundations and other permanent supports of
buildings and structures shall be protected from frost by one or more of the following methods:
1. Extending a minimum of 30 inches (762 mm) below grade.
2. Constructing in accordance with ASCE 32.
3. Erecting on solid rock.
Exception: Free-standing buildings meeting all of the following conditions shall not be required to be protected:
1. Assigned to Risk Category I.
22
2. Area of 600 square feet (56 m) or less for light-frame construction or 400 square feet (37 m) or less for other
than light-frame construction.
3. Eave height of 10 feet (3048 mm) or less.
Shallow foundations shall not bear on frozen soil unless such frozen condition is of a permanent character.
The following section is hereby added to read as follows:
1811 Radon-resistant construction. Newly constructed buildings with I-1, I-2 nursing homes, R-2, R-3, and R-4
occupancies shall provide radon reduction systems complying with the adopted International Residential Code,
Appendix AF, as amended by Town of Estes Park.
Chapter 21 Masonry
The following section is hereby added to read as follows:
2111.15 Fireplace Installation.
A. All fireplaces installed in the Restricted Area as defined herein and shown in Figure 2111.15 (Larimer County
Fireplace Area Map) shall be one of the following:
(i) A gas fireplace or fireplace with a gas log installed and functioning at time of final inspection.
(ii) An electric device; or
(iii). A fireplace that meets the most current emissions standards for wood stoves established by the Colorado
Air Quality Control Commission or any other clean-burning device that is approved by the commission.
B. All fireplaces installed prior to January 1, 2002, in the Restricted Area shall be allowed to remain in use until such
time as the owner voluntarily replaces it. Upon replacement, such fireplace shall be one of the types specified in
Subsection (A) (i), (ii), or (iii).
C. Within the Non-restricted Area, fireplaces including but not limited to masonry and factory-built fireplaces shall be
allowed without being required to meet the standards in Subsection (A).
17
FIGURE 2111.15 Larimer County Fireplace Area Map
Chapter 24 Glass and Glazing
The following section is hereby amended to read as follows:
2406.4.7 Glazing adjacent to stairway landings. Glazing adjacent to the stair landings where the glazing is less
than 36 inches (914 mm) above the landing and within a 60-inch (1524 mm) horizontal arc that is less than 180
degrees (3.14 rad) from the bottom tread nosing shall be considered to be a hazardous location.
Exception: Glazing that is protected by a guard complying with Sections 1015 and 1607.9 where the plane of the
glass is greater than 18 inches (457 mm) from the guard.
Chapter 29 Plumbing Systems
The following section is hereby amended to read as follows:
Table P2902.1 footnote “e” is revised to read as follows (no other changes to table)
e. For business and mercantile classifications with an occupant load of 15 or fewer and storage classifications without
plumbing fixtures, a service sink shall not be required.
The following section is hereby amended to read as follows:
18
2902.2 Separate facilities. Where plumbing fixtures are required, separate facilities shall be provided for each sex.
Exceptions:
1. Separate facilities shall not be required for dwelling units and sleeping units.
2. Separate facilities shall not be required in structures or tenant spaces with a total occupant load, including both
employees and customers, of 25 or fewer.
3. Separate facilities shall not be required in mercantile occupancies in which the maximum occupant load is 100 or
fewer.
4. Separate facilities shall not be required to be designated by sex where single-user toilets rooms are provided in
accordance with Section 2902.1.2.
5. Separate facilities shall not be required where rooms having both water closets and lavatory fixtures are
designed for use by both sexes and privacy for water closets are installed in accordance with Section 405.3.4 of
the
International Plumbing Code. Urinals shall be located in an area visually separated from the remainder of the facility
or each urinal that is provided shall be located in a stall.
The following section is hereby amended to read as follows:
2902.6 Small occupancies. Drinking fountains shall not be required for an occupant load of 25 or fewer.
The following chapter is hereby added to read as follows:
Chapter 36 Wildfire Hazard Mitigation Requirements
3601 General Purpose. The purpose of this chapter is to establish minimum standards for design and construction of new
buildings or portions thereof for the protection of life and property from wildfire hazards.
3601.1 Scope. Within the wildfire hazard area as defined herein and shown in Figure 3601, all new building
construction including additions shall comply with the provisions of this chapter.
EXCEPTIONS:
2
) in area.
1. Sheds, greenhouses, and similar detached accessory structures not exceeding 600 sq. ft. (55.7 m
2. Loafing sheds and similar unenclosed agricultural structures of any size
19
FIGURE 3601 LARIMER COUNTY WILDFIRE HAZARD AREA MAP
3601.2Alternate Materials and Methods of Compliance. The provisions of this chapter are not intended to
prevent the use of any material or method of compliance not specifically prescribed by this chapter, provided any
alternate has been approved and its use authorized by the building official in accordance with Section 104.11.
3602Definitions. For the purpose of this chapter, certain terms are defined as follows:
COMBUSTIBLE -a material that fails to meet the acceptance criteria of Standard Test Method for Behavior of
Materials in a Vertical Tube Furnace at 750°C (ASTM E136).
COMBUSTIBLE CONSTRUCTION -a type of construction that does not meet the requirement for noncombustible
construction.
DEFENSIBLE SPACE -a natural or man-made area, where woody vegetation capable of allowing a fire to spread
unchecked has been treated or modified to slow the spread and reduce the intensity of an advancing wildfire, and to
create an area for fire suppression operations to occur.
FIRE-RESISTIVE CONSTRUCTION -construction designed to resist the spread of fire.
FIRE-RESISTIVE RATING -the time that the material or construction will withstand the standard fire exposure as
determined by a fire test made in conformity with the standard methods of fire tests of buildings construction and
materials.
20
FLAME-SPREAD INDEX (FSI) - a relative index describing the surface-burning characteristics of building materials.
The test used to establish FSI evaluates the flame spread over the building material surface when exposed to a test
fire. The rate at which flame spreads across the specimen is compared on a scale of 0 for inorganic reinforced
cement board, to 100 for red oak." The following table identifies the flame-spread index and Flame Spread
Classification:
Flame Spread Classification Flame Spread Index
Class A 0 to 25
Class B 26 to 75
Class C 76 to 200
FUEL - combustible material.
NONCOMBUSTIBLE – a material that meets the acceptance criteria of Standard Test Method for Behavior of
Materials in a Vertical Tube Furnace at 750°C (ASTM E136).
NONCOMBUSTIBLE CONSTRUCTION - a type of construction in which a degree of fire safety is attained by the use
of noncombustible materials for structural members and other building, assemblies.
ONE-HOUR FIRE-RESISTIVE CONSTRUCTION – construction that will “withstand the standard fire exposure" for
one hour “as determined by a fire test made in conformity with the standard methods of fire tests of building
construction and materials".
WILDFIRE HAZARD - the relative threat that a wildland fire may cause the destruction of life and improved property.
WILDFIRE HAZARD AREA - The area west of a line starting at the intersection of the Wyoming border line and
range 69 west, then South nine miles to S.W. corner of section 31, Township 11, Range 69, then West three miles to
N.W. corner of Section 3, Township 10, Range 70, then South five miles to S.W. corner of Section 27, Township 10,
Range 70, then East three miles to S.W. corner of Section 30, Township 10, Range 69, then South nine miles to S.W.
corner of Section 7, Township 8, Range 69, then West one mile to N.W. corner of Section 13, Township 8, Range 70,
then South four miles to S.W. corner of Section 36, Township 8, Range 70, then East two miles to N.W. corner of
Section 6, Township 7, Range 69, then South three miles to S.W. corner of Section 17, Township 7, Range 69, then
East one mile to S.E. corner of Section 17, Township 7, Range 69, then South four miles to S.W. corner of Section 4,
Township 6, Range 69, then East one mile to S.E. corner of Section 4, Township 6, range 69, then South four miles
to S.W. corner of Section 27, Township 6, Range 69, then West one mile to S.W. corner of Section 28, Township 6,
Range 69, then South three miles to intersection of U.S. Highway 34, then West following U.S. Highway 34 two miles
to intersection with Range 69 West, then South seven and three quarter miles to S.W. corner of Section 18, Township
4, Range 69, then West one mile to S.W. corner of Section 13, Township 4, Range 70, then South three miles to
where the S.W. corner of Section 36, Township 9, Range 70 meets the Boulder County Line.
WILDFIRE MITIGATION - action taken to eliminate or reduce the wildfire hazard.
3603 Fire-Resistive Construction. Fire-resistive construction on all new structures shall be one of the following
types:
1. One-hour fire-resistive shell providing not less than one-hour fire-resistive construction at all exterior walls,
excluding openings and decks.
2. Exterior siding materials with a flame-spread classification of Class C or better. Exterior siding shall be
composed entirely of non-combustible materials for a minimum of 4 feet above finished grade.
EXCEPTION:
Non-combustible siding for the lowest 4 feet is not required if 5 feet or more of non-combustible landscaping material
or natural ground cover is provided in accordance with Section 331.6.
3. Log structures using solid logs with a minimum tip diameter of 6 inches (152.4 mm) for exterior wall construction
and 8 inches (203.2 mm) for roof beams, purlins and supporting columns.
21
3604 Defensible Space. Defensible space in compliance with current Colorado State Forest Service guidelines
shall be required on all new construction in the Wildfire Hazard Area. Any landscaping materials or natural ground
cover within 5 feet of the exterior walls of the building shall be non-combustible. For additions equal to or greater than
50% of the total square footage of the original structure, or changes in the occupancy or use of existing buildings that
would place the building under the scope of Section 3601.1, defensible space shall be provided around the entire
building.
EXCEPTION: Five feet of non-combustible landscaping material or natural ground cover is not required if the lowest 4
feet of siding is non-combustible in accordance with Section 3603.
3604.1 Evaluation. Evaluation of the defensible space will be based upon: 1. Current Colorado State Forest
Service standards and guidelines, and
2. Site specific vegetation and topographical characteristics.
The building official may allow alternatives to the Colorado State Forest Service Standards and Guidelines based on
specific site conditions.
3604.2 Completion. The defensible space must be approved prior to issuing a certificate of occupancy.
3605 Liquid Propane Gas. Liquid propane gas facilities installed in the Wildfire Hazard Area shall comply with
current county requirements, the International Fire Code and NFPA 58, for installation of such facilities. Liquid
propane gas containers and tanks shall be located within the defensible space.
3606 Spark Arresters. Chimneys serving fireplaces, woodstoves, barbecues, incinerators, or decorative heating
appliances in which solid fuel or liquid fuel is used, shall be provided with a spark arrestor. Spark arrestors shall be
constructed of woven or welded wire screening of 12 USA standard gage wire (0.1046 inch) (2.66 mm) having
openings not exceeding ½ inch. The net free area of the spark arrestor shall not be less than four times the net free
area of the outlet of the chimney.
3607 Fees. Fees shall be assessed in accordance with the adopted Larimer County wildfire assessment and
inspection fee schedule.
3608 Appeals. Appeals of interpretations made by the building official relative to the application of this chapter
shall be made to the Board of Appeals in accordance with Section 113.
3609 Maintenance. Defensible space areas created as required by this code or other Town of Estes Park
ordinances shall be maintained by the property owner. No re-planting or new planting of trees, shrubs or other
vegetation that would violate the defensible space requirements of this section shall be permitted.
Appendices
The following appendix chapters are hereby adopted as part of the 2021 International Building Code:
Appendix C. Group U - Agricultural Buildings
Appendix E. Supplementary Accessibility Requirements
Appendix I. Patio Covers
2021 INTERNATIONAL EXISTING BUILDING CODE (IEBC)
Chapter 1 Administration
The following section is hereby amended to read as follows:
101.1 Title. These regulations shall be known as the Existing Building Code of Town of Estes Park, hereinafter
referred to as “this code.”
The following section is hereby amended to read as follow:
101.2 Scope. The provisions of this code shall apply to the repair, alteration, change of occupancy, addition to and
relocation of existing buildings.
22
Exception: Detached one- and two-family dwellings and townhouses not more than three stories above grade plane
in height with a separate means of egress, short-term (Vacation Home) rentals, and their accessory structures not
more than three stories above grade plane in height, shall comply with this code or the International Residential
Code.
The following section is hereby amended to read as follows:
102.4 Referenced codes and standards. The codes as adopted and amended by Town of Estes Park and
standards referenced in this code shall be considered part of the requirements of this code to the prescribed extent of
each such reference and as further regulated in Sections 102.4.1 and 102.4.2.
Exception: Where enforcement of a code provision would violate the conditions of the listing of the equipment or
appliance, the conditions of the listing shall govern.
The following section is hereby amended to read in its entirety as follows:
SECTION 103 CODE COMPLIANCE AGENCY. All items related to Code Compliance Agency shall be as set forth in
Section 103 (“Code Compliance Agency”) of the adopted International Building Code (IBC).
The following section is hereby amended to read in its entirety as follows:
SECTION 104 DUTIES AND POWERS OF CODE OFFICIAL. All items related to Duties and Powers of Code Official
shall be as set forth in Section 104 (“Duties and Powers of Code Official”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 105 PERMITS. All items related to Permits shall be as set forth in Section 105 (“Permits”) of the adopted
IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 106 CONSTRUCTION DOCUMENTS. All items related to Construction Documents shall be as set forth in
Section 107 (“Construction Documents”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 107 TEMPORARY STRUCTURES AND USES. All items related to Temporary Structures and Uses shall
be as set forth in Section 108 (“Temporary Structures And Uses”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 108 FEES. All items related to Fees shall be as set forth in Section 109 (“Fees”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 109 INSPECTIONS. All items related to Inspections shall be as set forth in Section 110 (“Inspections”) of
the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 110 CERTIFICATE OF OCCUPANCY. All items related to Certificate of Occupancy shall be as set forth in
Section 111 (“Certificate of Occupancy”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 111 SERVICE UTILITIES. All items related to Service Utilities shall be as set forth in Section 112 (“Service
Utilities”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 112 MEANS OF APPEAL. All items related to Means of Appeal shall be as set forth in Section 113
(“Means of Appeal”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 113 VIOLATIONS. All items related to Violations shall be as set forth in Section 114 (“Violations”) of the
adopted IBC.
The following section is hereby amended to read in its entirety as follows:
23
SECTION 114 STOP WORK ORDER. All items related to Stop Work Orders shall be as set forth in Section 115
(“Stop Work Order”) of the adopted IBC.
The following section is hereby amended by adding definitions to read as follows:
SECTION 202 GENERAL DEFINITIONS
INTERNATIONAL FIRE CODE. The International Fire Code as adopted, amended, and administered by and within a
fire district.
NON-RESTRICTED AREA. That part of unincorporated Larimer County located west of Range 71 or north of the
north half of Township 10, and east of Range 72 as shown on the Larimer County Fireplace Area Map.
FIREPLACE RESTRICTED AREA. That part of unincorporated Larimer County located outside the Non-restricted
Area as shown on the Larimer County Fireplace Area Map.
WILDFIRE HAZARD AREA - The area west of a line starting at the intersection of the Wyoming border line and
range 69 west, then South nine miles to S.W. corner of section 31, Township 11, Range 69, then West three miles to
N.W. corner of Section 3, Township 10, Range 70, then South five miles to S.W. corner of Section 27, Township 10,
Range 70, then East three miles to S.W. corner of Section 30, Township 10, Range 69, then South nine miles to S.W.
corner of Section 7, Township 8, Range 69, then West one mile to N.W. corner of Section 13, Township 8, Range 70,
then South four miles to S.W. corner of Section 36, Township 8, Range 70, then East two miles to N.W. corner of
Section 6, Township 7, Range 69, then South three miles to S.W. corner of Section 17, Township 7, Range 69, then
East one mile to S.E. corner of Section 17, Township 7, Range 69, then South four miles to S.W. corner of Section 4,
Township 6, Range 69, then East one mile to S.E. corner of Section 4, Township 6, range 69, then South four miles
to S.W. corner of Section 27, Township 6, Range 69, then West one mile to S.W. corner of Section 28, Township 6,
Range 69, then South three miles to intersection of U.S. Highway 34, then West following U.S. Highway 34 two miles
to intersection with Range 69 West, then South seven and three quarter miles to S.W. corner of Section 18, Township
4, Range 69, then West one mile to S.W. corner of Section 13, Township 4, Range 70, then South three miles to
where the S.W. corner of Section 36, Township 9, Range 70 meets the Boulder County Line.
24
Larimer County Fireplace Area Map
The following section is hereby amended to read as follows:
301.3 Alteration, addition or change of occupancy. The alteration, addition or change of occupancy of all existing
buildings shall comply with Section 301.3.2.
The following section is hereby deleted in its entirety:
301.3.1 Prescriptive compliance method.
The following section is hereby deleted in its entirety:
301.3.3 Performance compliance method.
The following section is hereby amended to read as follows:
307.1 Smoke alarms. Where an alteration, addition, change of occupancy or relocation of a building is made to an
existing building or structure of a Group R and I-1 occupancy, the existing building shall be provided with smoke
alarms in accordance with the International Fire Code or Section R314 of the International Residential Code.
Exception: Work classified as Level 1 Alterations in accordance with Chapter 7, other than installation, alteration, or
repairs of plumbing or mechanical systems.
Thefollowing section is hereby amended to read as follows:
308.1 Carbon monoxide detection.Where an addition, alteration, change of occupancy or relocation of a building is
made to Group I-1, I-2, I-4 and R occupancies and classrooms of Group E occupancies, the existing building shall be
provided with carbon monoxide detection in accordance with the International Fire Code or Section R315 of the
International Residential Code.
25
Exceptions:
1. Work involving the exterior surfaces of buildings, such as the replacement of roofing or siding, the addition or
replacement of windows or doors, or the addition of porches or decks.
2. Work classified as Level 1 Alterations in accordance with Chapter 7, other than installation, alteration, or repairs
of plumbing or mechanical systems.
The following section is hereby deleted in its entirety:
CHAPTER 5 PRESCRIPTIVE COMPLIANCE METHOD
The following section is hereby amended to read as follows:
1011.5.6 Existing emergency escape and rescue openings. Where a change of occupancy would require an
emergency escape and rescue opening in accordance with Section 1031 of the International Building Code, operable
windows serving as the emergency escape and rescue opening shall comply with the following:
2
) with a
1. An existing operable window shall provide a minimum net clear opening of 5 square feet ( .47 m
minimum net clear opening height of 22 inches (559 mm) and a minimum net clear opening width of 20 inches
(508 mm).
2. A replacement window where such window complies with both of the following:
2.1. The replacement window meets the size requirements in Item 1.
2.2. The replacement window is the manufacturer’s largest standard size window that will fit within the existing frame
or existing rough opening. The replacement window shall be permitted to be of the same operating style as the
existing window or a style that provides for an equal or greater window opening area than the existing window.
The following section is hereby deleted in its entirety:
CHAPTER 13 PERFORMANCE COMPLIANCE METHODS
The following section is hereby added to read as follows (existing section 1402.7 is renumbered as 1402.10):
1402.7 Wildfire hazard area. If relocated or moved into a wildfire hazard area, structures shall comply with Chapter
36 of the International Building Code, or Section R331 of the International Residential Code, as applicable.
The following section is hereby added to read as follows:
1402.8 Fireplace restricted area. If relocated or moved into a Fireplace Restricted Area, structures shall comply
with Section 2111.15 of the International Building Code, or Section R1001.1.1 of the International Residential Code,
as applicable.
The following section is hereby added to read as follows:
1402.9 Moved manufactured or mobile homes. Where manufactured or mobile homes are to be located at or
above 6,000 feet (1829 m) elevation, or in areas where ultimate design wind speeds equal or exceed 140 mph (225
km/h), the permit holder shall install or take snow and wind mitigation measures pre-approved by the Town of Estes
Park Building Division. Such measures may include independent, engineered structural roof systems capable or
resisting the site design snow load, approved snow removal plans, engineered wind fences, or other engineered site-
specific designs considering prevailing winds, exposure, topography, trees and other relevant natural features.
Thefollowing section is hereby amended to read as follows:
1402.10 Required inspection and repairs. The code official shall be authorized to inspect, or to require approved
professionals to inspect at the expense of the owner, the various structural parts of a relocated building to verify that
structural components and connections have not sustained structural damage. Any repairs required by the code
official as a result of such inspection shall be made prior to the final approval.
2021 INTERNATIONAL FUEL GAS CODE (IFGC) Chapter 1 Administration
The following section is hereby amended to read as follows:
101.1 Title. These regulations shall be known as the Fuel Gas Code of Town of Estes Park, hereinafter referred to as
“this code.”
The following section is hereby amended to read as follows:
101.2 Scope. This code shall apply to the installation of fuel-gas piping systems, fuel gas appliances, gaseous
hydrogen systems and related accessories in accordance with Sections 101.2.1 through 101.2.5.
26
Exception: Detached one- and two-family dwellings and townhouses not more than three stories above grade plane
in height with a separate means of egress, short-term (Vacation Home) rentals, and their accessory structures not
more than three stories above grade plane in height, shall comply with this code or the International Residential
Code.
The following section is hereby amended to read as follows:
102.8 Referenced codes and standards. The codes and standards referenced in this code shall be those that are
listed in Chapter 8 and such codes as adopted and amended by Town of Estes Park and standards shall be
considered to be part of the requirements of this code to the prescribed extent of each such reference and as further
regulated in Sections 102.8.1 and 102.8.2.
Exception: Where enforcement of a code provision would violate the conditions of the listing of the equipment or
appliance, the conditions of the listing and the manufacturer’s installation instructions shall apply.
The following section is hereby amended to read in its entirety as follows:
SECTION 103 CODE COMPLIANCE AGENCY. All items related to Code Compliance Agency shall be as set forth in
Section 103 (“Code Compliance Agency”) of the adopted International Building Code (IBC).
The following section is hereby amended to read in its entirety as follows:
SECTION 104 DUTIES AND POWERS OF CODE OFFICIAL. All items related to Duties and Powers of Code Official
shall be as set forth in Section 104 (“Duties and Powers of Code Official”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 105 APPROVAL. All items related to Approval shall be as set forth in Sections 104.10 through 104.11.2
(“Modifications” through “Tests”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 106 PERMITS. All items related to Permits shall be as set forth in Section 105 (“Permits”) of the adopted
IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 107 CONSTRUCTION DOCUMENTS. All items related to Construction Documents shall be as set forth in
Section 107 (“Construction Documents”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 109 FEES. All items related to Fees shall be as set forth in Section 109 (“Fees”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 110 SERVICE UTILITIES. All items related to Service Utilities shall be as set forth in Section 112 (“Service
Utilities”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 111 TEMPORARY STRUCTURES AND USES. All items related to Temporary Structures and Uses shall
be as set forth in Section 108 (“Temporary Structures and Uses”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 112 INSPECTIONS AND TESTING. All items related to Inspections and Testing shall be as set forth in
Section 110 (“Inspections”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 113 MEANS OF APPEAL. All items related to Means of Appeal shall be as set forth in Section 113
(“Means of Appeal”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 114 BOARD OF APPEALS. All items related to Board of Appeals shall be as set forth in Section 113
(“Means of Appeal”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
27
SECTION 115 VIOLATIONS. All items related to Violations shall be as set forth in Sections 114 (“Violations”), 112.3
(“Authority to disconnect utility services”) and 116 (“Unsafe Structures and Equipment”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 116 STOP WORK ORDER. All items related to Stop Work Orders shall be as set forth in Section 115
(“Stop Work Order”) of the adopted IBC.
The following section is hereby amended by adding a definition to read as follows:
SECTION C202 GENERAL DEFINITIONS
INTERNATIONAL FIRE CODE. The International Fire Code as adopted, amended, and administered by and within a
fire district.
Chapter 3 General Regulations
The following section is hereby amended to read as follow:
303.3 Prohibited locations. Appliances shall not be located in sleeping rooms, bathrooms, toilet rooms, storage
closets or surgical rooms, or in a space that opens only into such rooms or spaces, except where the installation
complies with one of the following:
1. The appliance is a direct-vent appliance installed in accordance with the conditions of the listing and the
manufacturer’s instructions.
2. Vented room heaters, wall furnaces, vented decorative appliances, vented gas fireplaces, vented gas fireplace
heaters and decorative appliances for installation in vented solid fuel-burning fireplaces are installed in rooms
that meet the required volume criteria of Section 304.5.
3. The appliance is installed in a room or space that opens only into a bedroom or bathroom, and such room or
space is used for no other purpose and is provided with a solid weather-stripped door equipped with an approved
selfclosing device. Combustion air shall be taken directly from the outdoors in accordance with Section 304.6.
4. A clothes dryer is installed in a residential bathroom or toilet room having a permanent opening with an area of
2
) that communicates with a space outside of a sleeping room, bathroom,
not less than 100 square inches (.06 m
toilet room or storage closet.
Chapter 4 Gas Piping Installation
The following section is hereby amended to read as follows:
404.12 Minimum burial depth. Underground piping systems shall be installed a minimum of 18 24 inches (457 mm)
below grade, except as provided in Section 404.12.1.
The following section is hereby amended to read as follows:
404.12.1 Individual outside appliances. Individual lines to outside lights, grills, or other appliances shall be installed
not less than 18inches (457 mm) below finished grade.
Exception: Approved materials installed a minimum of 6 inches (152 mm) below finished grade when covered with a
minimum 4-inch-thick (101.6 mm) concrete slab.
The following section is hereby amended to read as follows:
406.4.1 Test pressure. The test pressure to be used shall be 10 psi for non-welded pipe for natural gas, 30 psi for
liquid propane gas.
Exception: One-piece tubing without joints other than at regulators are not required to be tested during inspection.
The following section is hereby amended to read as follows:
409.5.1 Located within same room. The shutoff valve shall be located in the same room as the appliance. The shutoff
valve shall be within 6 feet (1829 mm) of the appliance, and shall be installed upstream of the union, connector or quick
disconnect device it serves. Such shutoff valves shall be provided with access. Shutoff valves serving movable
appliances, such as cooking appliances and clothes dryers, shall be considered to be provided with access where
installed behind such appliances. Appliance shutoff valves located in the firebox of a fireplace shall be installed in
accordance with the appliance manufacturer’s instructions and shall have a secondary shutoff outside the firebox.
The following section is hereby amended to read as follows:
410.3 Venting of regulators. Pressure regulators that require a vent shall have an independent vent to the outside of
the building. The vent shall terminate at least 3 feet (914 mm) from any openings into the building. The vent shall be
designed to prevent the entry of insects, water, or foreign objects.
28
Chapter 5 Chimneys and Vents
The following section is hereby amended to read as follows:
501.8 Appliances not required to be vented. The following appliances shall not be required to be vented:
1. Electric ranges.
2. Electric built-in domestic cooking units listed and marked for optionalventing.
3. Hot plates and laundry stoves.
4. Type 1 clothes dryers (Type 1 clothes dryers shall be exhausted in accordance with the requirements of Section
614).
5. A single booster-type automatic instantaneous water heater, where designed and used solely for the sanitizing
rinse requirements of a dishwashing machine, provided that the heater is installed in a commercial kitchen
having a mechanical exhaust system. Where installed in this manner, the draft hood, if required, shall be in place
and unaltered and the draft hood outlet shall be not less than 36 inches (914 mm) vertically and 6 inches (152
mm) horizontally from any surface other than the heater.
6. Refrigerators.
7. Counter appliances.
8. Direct-fired makeup air heaters.
9. Specialized appliances of limited input such as laboratory burners and gas lights.
Where the appliances listed in Items 5 through 11 are installed so that the aggregate input rating exceeds 20 British
3
thermal units (Btu) per hour per cubic foot (207 watts per m) of volume of the room or space in which such
appliances are installed, one or more shall be provided with venting systems or other approved means for conveying
the vent gases to the outdoor atmosphere so that the aggregate input rating of the remaining unvented appliances
3
). Where the room or space in which the appliance
does not exceed 20 Btu per hour per cubic foot (207 watts per m
is installed is directly connected to another room or space by a doorway, archway or other opening of comparable
size that cannot be closed, the volume of such adjacent room or space shall be permitted to be included in the
calculations.
The following section is hereby amended to read as follows:
503.1 General. The venting of appliances shall be in accordance with Sections 503.2 through 503.16. Vents shall
terminate 12” (305 mm) minimum above anticipated snow level and a minimum of 22 inches (559 mm) above the
surface or grade directly below.
The following section is hereby amended to read as follows:
503.4.1 Plastic piping. Where plastic piping is used to vent an appliance, the appliance shall be listed for use with
such venting materials and the appliance manufacturer’s installation instructions shall identify the specific plastic
piping material. The plastic pipe venting materials shall be labeled in accordance with the product standards specified
by the appliance manufacturer or shall be listed and labeled in accordance with UL 1738. Where installed as an
exhaust vent for a gas-fired water heater, the new plastic pipe shall be tested with 5 psi maximum air pressure by the
installer prior to being connected to the water heater.
Chapter 6 Specific Appliances
The following section is hereby amended to read as follows:
614.4.1 Terminal location. Exhaust duct terminations shall be in accordance with the dryer manufacturer's installation
instructions and not less than 3 feet (914 mm) in any direction from openings into buildings, including openings in
ventilated soffits.
The following section is hereby amended to read as follows:
614.9.2 Duct installation. Exhaust ducts shall be supported at 4-foot (1219 mm) intervals and secured in place. The
insert end of the duct shall extend into the adjoining duct or fitting in the direction of airflow. Ducts shall not be joined
with screws or similar fasteners. Where dryer exhaust ducts are enclosed in wall or ceiling cavities, such cavities shall
allow the installation of the duct without deformation.
The following section is hereby amended to read as follows:
614.9.4 Duct length. The maximum allowable exhaust duct length shall be determined by one of the methods
specified in Section 614.9.4.1 through 614.9.4.2.
29
The following section is hereby deleted in its entirety: 614.9.4.2 Manufacturer’s instructions.
The following section is hereby amended to read as follows:
614.9.4.2 Dryer exhaust duct power ventilator length. The maximum length of the exhaust duct shall be
determined by the dryer exhaust duct power ventilator manufacturer’s installation instructions.
The following section is deleted in its entirety as follows:
621 UNVENTED ROOM HEATERS
The following section is hereby added to read as follows:
623.3.1 Kitchens with gas cooking appliances. In new construction, kitchens with gas cooking appliances shall be
supplied with an exhaust system vented to the outside in accordance with Chapter 5. Ducts serving kitchen exhaust
systems shall not terminate in an attic, crawl space or areas inside the building and shall not induce or create a negative
pressure in excess of negative 3 Pa or adversely affect gravity-vented appliances.
The following section is hereby amended to read as follows:
630.3 Combustion and ventilation air. Unvented infrared heaters shall not be installed.
30
2021 INTERNATIONAL MECHANICAL CODE AMENDMENTS (IMC) Chapter 1
Administration
The following section is hereby amended to read as follows:
101.1 Title. These regulations shall be known as the Mechanical Code of Town of Estes Park, hereinafter referred to
as
“this code.”
The following section is hereby amended to read as follows:
102.8 Referenced codes and standards. The codes and standards referenced herein shall be those that are listed
in Chapter 15 and such codes as adopted and amended by Town of Estes Park and standards shall be considered
as part of the requirements of this code to the prescribed extent of each such reference and as further regulated in
Sections 102.8.1 and 102.8.2.
Exception: Where enforcement of a code provision would violate the conditions of the listing of the equipment or
appliance, the conditions of the listing and the manufacturer’s installation instructions shall apply.
The following section is hereby amended to read in its entirety as follows:
SECTION 103 CODE COMPLIANCE AGENCY. All items related to Code Compliance Agency shall be as set forth in
Section 103 (“Code Compliance Agency”) of the adopted International Building Code (IBC).
The following section is hereby amended to read in its entirety as follows:
SECTION 104 DUTIES AND POWERS OF CODE OFFICIAL. All items related to Duties and Powers of Code Official
shall be as set forth in Section 104 (“Duties and Powers of Code Official”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 105 APPROVAL. All items related to Approval shall be as set forth in Sections 104.10 through 104.11.2
(“Modifications” through “Tests”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 106 PERMITS. All items related to Permits shall be as set forth in Section 105 (“Permits”) of the adopted
IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 107 TEMPORARY STRUCTURES AND USES. All items related to Temporary Structures and Uses shall
be as set forth in Section 108 (“Temporary Structures and Uses”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 108 INSPECTIONS AND TESTING. All items related to Inspections and Testing shall be as set forth in
Section 110 (“Inspections”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 109 FEES. All items related to Fees shall be as set forth in Section 109 (“Fees”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 110 CONSTRUCTION DOCUMENTS. All items related to Construction Documents shall be as set forth in
Section 107 (“Construction Documents”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 112 SERVICE UTILITIES. All items related to Service Utilities shall be as set forth in Section 112 (“Service
Utilities”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 113 STOP WORK ORDER. All items related to Stop Work Orders shall be as set forth in Section 115
(“Stop Work Order”) of the adopted IBC.
31
The following section is hereby amended to read in its entirety as follows:
SECTION 114 MEANS OF APPEAL. All items related to Means of Appeal shall be as set forth in Section 113
(“Means of Appeal”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 115 VIOLATIONS. All items related to Violations shall be as set forth in Sections 114 (“Violations”), 112.3
(“Authority to disconnect utility services”) and 116 (“Unsafe Structures and Equipment”) of the adopted IBC.
Chapter 2 Definitions
The following section is hereby amended by adding definitions to read as follows:
SECTION 202 GENERAL DEFINITIONS
FIREPLACE INSERT: A wood burning device designed to be installed in an existing fireplace.
INTERNATIONAL FIRE CODE. The International Fire Code as adopted, amended, and administered by and within a
fire district.
WOOD STOVE: An appliance designed for or capable of burning wood and capable of and intended for domestic
space heating or domestic water heating.
Chapter 5 Exhaust Systems
The following section is hereby amended to read as follows:
504.4.1 Termination location. Exhaust duct terminations shall be in accordance with the dryer manufacturer's
installation instructions and not less than 3 feet (914 mm) in any direction from openings into buildings, including
openings in ventilated soffits.
The following section is hereby amended to read as follows:
504.9.4 Duct length. The maximum allowable exhaust duct length shall be determined by one of the methods
specified in Sections 504.9.4.1 through 504.9.4.2.
The following section is hereby deleted in its entirety:
504.9.4.2 Manufacturer’s instructions.
The following section is hereby amended to read as follows:
504.9.4.2. Dryer exhaust duct power ventilator length. The maximum length of the exhaust duct shall be
determined by the dryer exhaust duct power ventilator manufacturer’s installation instructions.
Chapter 6 Duct Systems
The following section is hereby amended by adding one sentence at the beginning to read as follows: 601.5
Return air openings. A return air path shall be provided in all habitable rooms by means of ducts or transfer grills
Return air openings for heating, ventilation and air-conditioning systems shall comply with all of the following: \[Items
1 through 8 and the Exceptions are unchanged.\]
The following section is hereby amended in its entirety to read as follows:
602.3 Stud cavity and joist space plenums. Stud wall cavities and the spaces between solid floor joists shall not be
utilized as air plenums.
The following section is hereby amended by adding this conversion chart below to read as follows: Table
a
603.4 DUCT CONSTRUCTION MINIMUM SHEET METAL THICKNESS FOR SINGLE DWELLING UNITS
32
Thickness (inches) .013 .016 .018 .019 .023 .024 .027 .034
Galvanized Steel (gauge) 32 30 28 28 25 25 24 21
Aluminum (gauge) 28 26 25 24 23 22 21 19
For SI: 1 inch = 25.4 mm, 1-inch water gauge = 249 Pa.
a. Ductwork that exceeds 20 inches by dimension or exceeds a pressure of 1-inch water gauge shall be constructed in accordance
with SMACNA HVAC Duct Construction Standards—Metal and Flexible.
Chapter 8 Chimneys and Vents
The following section is hereby added to read as follows:
802.6.1 Minimum vent height above snow level. Vents shall terminate 12” (305 mm) minimum above anticipated
snow level and a minimum of 22 inches (559 mm) above the surface or grade directly below.
Chapter 9 Specific Appliances, Fireplaces, and Solid Fuel-Burning Equipment
The following section is hereby added to read as follows:
901.5 Installation
A. All fireplaces installed in the Restricted Area (Figure 901.5 Larimer County Fireplace Area Map) shall be one of
the following:
(i) A gas fireplace or fireplace with a gas log installed and functioning at time of final inspection.
(ii). An electric device; or
(iii). A fireplace that meets the most current emissions standards for wood stoves established by the Colorado
Air Quality Control Commission, or any other clean-burning device that is approved by the commission.
B. All fireplaces installed prior to January 1, 2002, in the Restricted Area shall be allowed to remain in use until such
time as the owner voluntarily replaces it. Upon replacement, such fireplace shall be one of the types specified in
Subsection (A) (i), (ii), or (iii).
C. Within the Non-restricted Area, fireplaces including but not limited to masonry and factory-built fireplaces shall be
allowed without being required to meet the standards in Subsection (A).
The following section is hereby amended to read as follows:
903.1 General. Factory-built fireplaces shall be listed and labeled and shall be installed in accordance with the
conditions of the listing. Factory-built fireplaces shall be tested in accordance with UL 127. Factory-built fireplaces
shall comply with Section 901.5.
The following section is hereby amended to read as follows:
905.1 General. Fireplace stoves and solid-fuel-type room heaters shall be listed and labeled and shall be installed in
accordance with the conditions of the listing. Fireplace stoves shall be tested in accordance with UL 737. Solid-
fueltype room heaters shall be tested in accordance with UL 1482. Fireplace inserts intended for installation in
fireplaces shall be listed and labeled in accordance with the requirements of UL 1482 and shall be installed in
accordance with the manufacturer’s instructions. New wood-burning residential hydronic heaters shall be EPA
certified. Wood-burning appliances shall meet the latest emission standards as established by the State of Colorado
and Federal Regulation 40 CFR Part 60, Subpart AAA.
33
FIGURE 901.5Larimer County Fireplace Area Map
2021 INTERNATIONAL PLUMBING CODE (IPC)
Chapter 1 Administration
The following section is hereby amended to read as follows:
101.1 Title. These regulations shall be known as the International Plumbing Code of Town of Estes Parkhereinafter
referred to as “this code.”
The following section is hereby amended to read as follows:
102.8 Referenced codes and standards. The codes and standards referenced in this code shall be those that are
listed in Chapter 15 and such codes as adopted and amended by Town of Estes Parkand standards shall be
considered as part of the requirements of this code to the prescribed extent of each such reference and as further
regulated in Sections 102.8.1 and 102.8.2.
The following section is hereby amended to read in its entirety as follows:
SECTION 103 CODE COMPLIANCE AGENCY. All items related to Code Compliance Agency shall be as set forth in
Section 103 (“Code Compliance Agency”) of the adopted International Building Code (IBC).
The following section is hereby amended to read in its entirety as follows:
SECTION 104 DUTIES AND POWERS OF CODE OFFICIAL. All items related to Duties and Powers of Code Official
shall be as set forth in Section 104 (“Duties and Powers of Code Official”) of the adopted IBC.
34
The following section is hereby amended to read in its entirety as follows:
SECTION 105 APPROVAL. All items related to Approval shall be as set forth in Sections 104.10 through 104.11.2
(“Modifications” through “Tests”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 106 PERMITS. All items related to Permits shall be as set forth in Section 105 (“Permits”) of the adopted
IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 107 TEMPORARY STRUCTURES AND USES. All items related to Temporary Structures and Uses shall
be as set forth in Section 108 (“Temporary Structures and Uses”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 108 INSPECTIONS AND TESTING. All items related to Inspections and Testing shall be as set forth in
Section 110 (“Inspections”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 109 FEES. All items related to Fees shall be as set forth in Section 109 (“Fees”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 110 CONSTRUCTION DOCUMENTS. All items related to Construction Documents shall be as set forth in
Section 107 (“Construction Documents”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 112 SERVICE UTILITIES. All items related to Service Utilities shall be as set forth in Section 112 (“Service
Utilities”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 113 STOP WORK ORDER. All items related to Stop Work Orders shall be as set forth in Section 115
(“Stop Work Order”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 114 MEANS OF APPEAL. All items related to Means of Appeal shall be as set forth in Section 113
(“Means of Appeal”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 115 VIOLATIONS. All items related to Violations shall be as set forth in Sections 114 (“Violations”), 112.3
(“Authority to disconnect utility services”) and 116 (“Unsafe Structures and Equipment”) of the adopted IBC.
Chapter 2 Definitions
The following section is hereby amended by adding a definition to read as follows:
SECTION 202 GENERAL DEFINITIONS
INTERNATIONAL FIRE CODE. The International Fire Code as adopted, amended, and administered by and within a
fire district.
.
Chapter 3 General Regulations
The following section is hereby amended to read as follows:
305.4.1 Sewer depth. Building sewers that connect to private sewage disposal systems shall be not less than 12”
below finished grade and comply with State of Colorado and Larimer County Department of Health and Environment
Regulations.
The following section is hereby amended to read as follows:
35
312.1 Required tests. The permit holder shall make the applicable tests prescribed in Sections 312.2 through 312.10
to determine compliance with the provisions of this code. The permit holder shall give reasonable advance notice to
the code official when the plumbing work is ready for tests. The equipment, material, power and labor necessary for
the inspection and test shall be furnished by the permit holder and he or she shall be responsible for determining that
the work will withstand the test pressure prescribed in the following tests. Plumbing system piping shall be tested with
either water or by air. After the plumbing fixtures have been set and their traps filled with water, the entire drainage
system shall be submitted to final tests. The code official shall require the removal of any cleanouts if necessary to
ascertain whether the pressure has reached all parts of the system.
The following section is hereby amended by deleting the first sentence to read as follows:
312.3 Drainage and vent air test. An air test shall be made by forcing air into the system until there is a uniform
gauge pressure of 5 psi (34.5 kPa) or sufficientto balance a 10-inch (254 mm) column of mercury. This pressure
shall be held for a test period of not less than 15 minutes. Any adjustments to the test pressure required because of
changes in ambient temperatures or the seating of gaskets shall be made prior to the beginning of the test period.
Chapter 4 Fixtures, Faucets and Fixture Fittings
The following section is hereby amended by changing footnote e to read as follows:
TABLE 403.1 MINIMUM NUMBER OF REQUIRED PLUMBING FIXTURES
e. For business and mercantile classifications with an occupant load of 15 or fewer and storage classifications without
plumbing fixtures, a service sink shall not be required.
The following section is hereby amended to read as follows:
403.2 Separate facilities. Where plumbing fixtures are required, separate facilities shall be provided for each sex.
Exceptions:
1. Separate facilities shall not be required for dwelling units and sleeping units.
2. Separate facilities shall not be required in structures or tenant spaces with a total occupant load, including both
employees and customers, of 25 or fewer.
3. Separate facilities shall not be required in mercantile occupancies in which the maximum occupant load is 100 or
fewer.
4. Separate facilities shall not be required to be designated by sex where single-user toilets rooms are provided in
accordance with Section 403.1.2.
5. Separate facilities shall not be required where rooms having both water closets and lavatory fixtures are
designed for use by both sexes and privacy for water closets are installed in accordance with Section 405.3.4.
Urinals shall be located in an area visually separated from the remainder of the facility or each urinal that is
provided shall be located in a stall.
The following section is hereby amended to read as follows:
409.4 Residential dishwasher waste connection. The waste connection of a residential dishwasher shall connect
directly to a wye branch fitting on the tailpiece of the kitchen sink, directly to the dishwasher connection of a food
waste disposer, or through an air break to a standpipe. The waste line of a residential dishwasher shall rise and be
securely fastened to the underside of the sink rim or countertop. Residential dishwashers may be connected to a
separately trapped standpipe provided with an air break as shown in Figure 409.
36
FIGURE 409
The following section is hereby amended to read as follows:
410.2 Small occupancies. Drinking fountains shall not be required for an occupant load of 25 or fewer.
The following section is hereby amended to read as follows:
421.4.1 Floor and wall area. Bathtub floors, shower floors, wall areas above built-in tubs that have installed shower
heads and walls in shower compartments shall be constructed of smooth, corrosion-resistant, and nonabsorbent
waterproof materials. Wall materials shall extend to a height of not less than 6 feet (1829 mm) above the room floor
level, and not less than 72 inches (1828 mm) above the drain of the tub or shower. Such walls shall form a watertight
joint with each other and with either the tub or shower floor.
The following section is hereby added to read as follows:
421.7 Shower head location. Showerheads shall be located on the sidewall of shower compartments or be
arranged so the shower head does not discharge directly at the entrance to the compartment and the bather can
adjust the valve prior to stepping into the shower spray.
Exception: Roll-in showers installed in accordance with ICC A117.1-17 standards.
The following section is hereby added to read as follows:
421.8 Shower valve location. A shower or tub/shower control valve shall be installed only where the spout and/or
shower head discharges into an approved tub or shower compartment. Exception: Emergency showers.
Chapter 6 Water Supply and Distribution
The following section is hereby amended by deleting the exception in its entirety to read as follows:
605.15.2 Solvent cementing.
Joint surfaces shall be clean and free from moisture, and an approved primer shall be applied. Solvent cement,
orange in color and conforming to ASTM F493, shall be applied to joint surfaces. The joint shall be made while the
cement is wet, and in accordance with ASTM D2846 or ASTM F493. Solvent cement joints shall be permitted above
or below ground.
Chapter 7 Sanitary Drainage
The following section is hereby amended to read as follows:
701.2 Connection to sewer required. Sanitary drainage piping from plumbing fixtures in buildings and sanitary
drainage piping systems from premises shall be connected to a public sewer. Where a public sewer is not available,
the sanitary drainage piping and systems shall be connected to a private sewage disposal system in compliance with
state or local requirements.
Exception: Graywater systems shall comply with Larimer County Department of Health and Environment regulations.
37
The following section is hereby amended by deleting the exception in its entirety to read as follows:
705.10.2 Solvent cementing. Joint surfaces shall be clean and free from moisture. A purple primer that conforms to
ASTM F656 shall be applied. Solvent cement not purple in color and conforming to ASTM D2564, CSA B137.3, CSA
B181.2 or CSA B182.1 shall be applied to all joint surfaces. The joint shall be made while the cement is wet and shall
be in accordance with ASTM D2855. Solvent-cement joints shall be permitted above or below ground.
The following section is hereby amended to read as follows:
708.3 Building drain and building sewer junction. The junction of the building drain and the building sewer shall be
served by a cleanout that is located at the junction or within 10 feet (3048 mm) of the developed length of piping
upstream of the junction. For the requirements of this section, the removal of the water closet shall not be required to
provide cleanout access. When the cleanout is installed at the junction of the building drain and building sewer, it
shall be an approved two-way fitting with a single riser not to exceed 4 feet (1219 mm) in depth, or a two-riser
cleanout using back-to-back combination fittings or equal of schedule 40 material.
Chapter 9 Vents
The following section is hereby amended to read as follows:
903.1.1 Roof extension unprotected.Open vent pipes that extend through a roof shall be terminated not less than
6 inches (152 mm) above the roof.
Chapter 13 Non-potable Water Systems
The following section is hereby amended to read as follows:
1301.1 General. Larimer County Department of Health and Environment regulations shall govern the materials,
design, construction and installation of systems for the collection, storage, treatment and distribution of nonpotable
water.
The following section is hereby amended to read in its entirety as follows:
SECTION 103 CODE COMPLIANCE AGENCY. All items related to Code Compliance Agency shall be as set forth in
Section 103 (“Code Compliance Agency”) of the adopted International Building Code (IBC).
The following section is hereby amended to read in its entirety as follows:
SECTION 104 FEES. All items related to Fees shall be as set forth in Section 109 (“Fees”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 105 DUTIES AND POWERS OF CODE OFFICIAL. All items related to Duties and Powers of Code Official
shall be as set forth in Section 104 (“Duties and Powers of Code Official”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 106 APPROVAL. All items related to Approval shall be as set forth in Sections 104.10 through 104.11.2
(“Modifications” through “Tests”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 107 MEANS OF APPEAL. All items related to Means of Appeal shall be as set forth in Section 113
(“Means of Appeal”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 108 BOARD OF APPEALS. All items related to Board of Appeals shall be as set forth in Section 113
(“Means of Appeal”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 110 STOP WORK ORDER. All items related to Stop Work Orders shall be as set forth in Section 115
(“Stop Work Order”) of the adopted IBC.
The following section is hereby amended to read as follows:
38
111.1.3 Structure unfit for human occupancy. A structure is unfit for human occupancy whenever the code official
or Health Official finds that such structure is unsafe, unlawful or, because of the degree to which the structure is in
disrepair, lacks maintenance, is insanitary, is vermin or rat infested, contains filth and contamination, lacks sanitary
facilities or other essential equipment required by this code, or because the location of the structure constitutes a
hazard to the occupants of the structure or to the public.
The following section is hereby amended to read as follows:
111.1.4 Unlawful structure. An unlawful structure is one found in whole or in part that was erected, altered or
occupied contrary to law.
The following section is hereby amended to read as follows:
111.1.5 Dangerous structure. For the purpose of this code, any structure that has any or all of the conditions or
defects described as follows shall be considered dangerous:
1. Any door, aisle, passageway, stairway, exit or other means of egress that does not conform to the approved
building or fire code of the jurisdiction as related to the requirements for existing buildings.
2. The walking surface of any aisle, passageway, stairway, exit or other means of egress is so warped, worn loose,
torn or otherwise unsafe as to not provide sage and adequate means of egress.
3. Any portion of a building, structure or appurtenance that has been damaged by fire, earthquake, wind, flood,
deterioration, neglect, abandonment, vandalism or by any other cause to such an extent that it is likely to partially
or completely collapse, or to become detached or dislodged.
4. Any portion of a building, or any member, appurtenance, or ornamentation on the exterior therefor that is not of
sufficient strength or stability, or is not so anchored, attached or fastened in place so as to be capable of resisting
natural or artificial loads of one and one-half the original designed value.
5. The building or structure, or part of the building or structure, because of dilapidation, deterioration, decay, faulty
construction, the removal, or movement of some portion of the ground necessary for the support, or for any other
reasons, is likely to partially or completely collapse or some portion of the foundation or underpinning of the
building or structure is likely to fail or give way.
6. The building or structure, or any portion thereof, is clearly unsafe for its use and occupancy.
7. The building or structure is neglected damaged, dilapidated, unsecured or abandoned so as to become an
attractive nuisance to children who might play in the building or structure to their danger, becomes a harbor for
vagrants, criminals, or immoral persons, or enables persons to resort to the building or structure for committing a
nuisance or an unlawful act.
8. Any building or structure has been constructed or exists or is maintainedin violation of any specific requirement
or prohibition applicable to such building or structure provided by the approved building or fire code of the
jurisdiction, or of any law or ordinance to such an extent as to present either a substantial risk of fire, building
collapse or any other threat to life and safety.
9. Any building or structure, used or intended to be used for dwelling purposes, because of inadequate
maintenance, dilapidation, decay, damage, faulty construction or arrangement, or otherwise, is determined by
the code official or Health Official to be unsanitary, unfit for human habitation or in such a condition that is likely
to cause sickness or disease.
10. Any building or structure, because of a lack of sufficient or proper fire-resistance-rated construction, fire
protection systems, electrical system, fuel connections, mechanical system, plumbing system or other cause, is
determined by the code official to be a threat to life or health.
11. Any portion of a building remains on a site after the demolition or destruction of the building or structure or
whenever any building or structure is abandoned so as to constitute such building or portion thereof as an
attractive nuisance or hazard to the public.
The following section is hereby amended to read as follows:
111.2 Closing of vacant structures. If the structure is vacant and unfit for human habitation and occupancy, and is
not in danger of structure collapse, the code official is authorized to post a placard of condemnation on the premises
and order the structure closed up so as not be an attractive nuisance. Upon failure of the owner or owner’s
authorized agent to close up the premises within in the time specified in the order, the code official shall cause the
premises to be closed and secured through any available public agency or by contract or arrangement by private
persons and the cost thereof shall be charged against the real estate upon which the structure is located and shall be
a lien upon such real estate or may be made a personal obligation of the person causing the violation, whichever the
legislative body of this jurisdiction shall determine is appropriate, and shall be collected by any other legal resource.
The following section is hereby amended to read as follows:
39
113.3 Failure to comply. If the owner of a premises or owner’s authorized agent fails to comply with a demolition
order within the time prescribed, the code official shall cause the structure to be demolished and removed, either
through an available public agency or by contract or arrangement with private persons, and the cost of such
demolition and removal shall be charged against the real estate upon which the structure is located and shall be a
lien upon such real estate, or the cost may be made a personal obligation of the person causing the violation,
whichever the legislative body of this jurisdiction shall determine is appropriate based on the specific situation at the
time.
Chapter 2 Definitions
The following section is hereby amending by adding or amending definitions to read as follows:
SECTION 202 GENERAL DEFINITIONS
CODE OFFICIAL. The building official who is charged with the administration and enforcement of this code, or any
duly authorized representative.
HEALTH OFFICIAL. Employee of the Larimer County Department of Health and Environment, state or federal official
duly authorized to enforce environmental or public health regulations.
INTERNATIONAL FIRE CODE. The International Fire Code as adopted, amended, and administered by and within a
fire district.
CHAPTER 3 is hereby deleted in its entirety.
GENERAL REQUIREMENTS
CHAPTER 4 is hereby deleted in its entirety. LIGHT, VENTILATION AND OCCUPANCY LIMITATIONS
CHAPTER 5 is hereby deleted in its entirety.
PLUMBING FACILITIES AND FIXTURE REQUIREMENTS
CHAPTER 6 is hereby deleted in its entirety.
MECHANICAL AND ELECTRICAL REQUIREMENTS
CHAPTER 7 is hereby deleted in its entirety.
FIRE SAFETY REQUIREMENTS
CHAPTER 8 is hereby amended in its entirety to read as follows:
REFERENCED STANDARDS
ICC International Code Council, 500 New Jersey Avenue, NW, 6th Floor, Washington, DC 20001
IBC-21: International Building Code, pages 102.3, 201.3
IEBC-21: International Existing Building Code, pages 102.3, 201.3
IFGC-21: International Fuel Gas Code, pages102.3, 201.3
IMC-21: International Mechanical Code, pages 102.3, 201.3
IPC-21: International Plumbing Code, pages 102.3, 201.3
IRC-21: International Residential Code, pages 102.3, 201.3
40
2021 INTERNATIONAL SWIMMING POOL AND SPA CODE (ISPSC) Chapter 1
Administration
The following section is hereby amended to read as follows:
101.1 Title. These regulations shall be known as the Swimming Pool and Spa Code of Town of Estes Park,
hereinafter referred to as “this code.”
The following section is hereby amended to read as follows:
101.2 Scope. The provisions of this code shall apply to the construction, alteration, movement, renovation,
replacement, repair and maintenance of aquatic recreation facilities, pools, and spas. The pools and spas covered by
this code are either permanent or temporary and shall be only those that are designed and manufactured to be
connected to a circulation system and that are intended for swimming, bathing, or wading.
Exception: All pools that are 24” deep or greater shall comply with Section 305 “Barrier Requirements.”
The following section is hereby amended to read as follows:
102.7 Referenced codes and standards. The codes and standards referenced in this code shall be those that are
listed in Chapter 11 and such codes as adopted and amended by Town of Estes Park and standards shall be
considered to be part of the requirements of this code to the prescribed extent of each such reference. Where
differences occur between provisions of this code and the referenced standards, the provisions of this code shall be
the minimum requirements.
The following section is hereby amended to read in its entirety as follows:
SECTION 103 CODE COMPLIANCE AGENCY. All items related to Code Compliance Agency shall be as set forth in
Section 103 (“Code Compliance Agency”) of the adopted International Building Code (IBC).
The following section is hereby amended to read in its entirety as follows:
SECTION 104 DUTIES AND POWERS OF CODE OFFICIAL. All items related to Duties and Powers of Code Official
shall be as set forth in Section 104 (“Duties and Powers of Code Official”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 105 PERMITS. All items related to Permits shall be as set forth in Section 105 (“Permits”) of the adopted
IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 106 CONSTRUCTION DOCUMENTS. All items related to Construction Documents shall be as set forth in
Section 107 (“Construction Documents”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 108 FEES. All items related to Fees shall be as set forth in Section 109 (“Fees”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 109 SERVICE UTILITIES. All items related to Service Utilities shall be as set forth in Section 112 (“Service
Utilities”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 110 INSPECTIONS. All items related to Inspections shall be as set forth in Section 110 (“Inspections”) of
the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 111 MEANS OF APPEAL. All items related to Means of Appeal shall be as set forth in Section 113
(“Means of Appeal”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 112 BOARD OF APPEALs. All items related to Board of Appeals shall be as set forth in Section 113
(“Means of Appeal”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
41
SECTION 113 VIOLATIONS. All items related to Violations shall be as set forth in Sections 114 (“Violations”), 112.3
(“Authority to disconnect utility services”) and 116 (“Unsafe Structures and Equipment”) of the adopted IBC.
The following section is hereby amended to read in its entirety as follows:
SECTION 114 STOP WORK ORDER. All items related to Stop Work Orders shall be as set forth in Section 115
(“Stop Work Order”) of the adopted IBC.
Chapter 2 Definitions
The following section is hereby amending by adding a definition to read as follows:
SECTION 202 GENERAL DEFINITIONS
INTERNATIONAL FIRE CODE. The International Fire Code as adopted, amended, and administered by and within
the Estes Valley Fire District.
Chapter 3 General Compliance
The following section is hereby amended in its entirety to read as follows:
304.2 General. Pools and spas located in flood hazard areas indicated within the International Building Code or the
International Residential Code shall comply with the Town of Estes Park Land Use Code.
Chapter 4 Public Swimming Pools
The following section is hereby amended in its entirety to read as follows:
403.1 Maximum bather load. The maximum bather occupant load of pools shall be in accordance with International
Building Code Section 1004.
42
EXHIBIT B
2021 INTERNATIONAL RESIDENTIAL CODE (IRC) CHAPTER 1 SCOPE AND
ADMINISTRATION
The following section is hereby amended to read as follows:
R101.1 Title. These provisions shall be known as the Residential Code for One- and Two-Family Dwellings of Town
of Estes Park and shall be cited as such and will be referred to herein as “this code.”
The following section is hereby amended to read as follows:
R101.2 Scope.
Exceptions: The following shall be permitted to be constructed in accordance with this code:
1.Live/work units complying with the requirements of Section 508.5 of the International Building Code.
2.Owner-occupied lodging houses with five or fewer guestrooms where complying with Sections R332.2 through
R332.2.14 and R332.3.
3.A care facility with five or fewer persons receiving custodial or medical care within a dwelling unit, where
provided with an automatic sprinkler system complying with Section P2904 or International Building Code
Section 903.2.8.
4.Resort lodge cottages not exceeding 10 occupants, where complying with Sections R332.2 through R332.2.14
and R332.3 5. Short-term (Vacation Home) rentals.
6.Family childcare homes complying with Appendix M and Colorado state licensing requirements.
The following section is hereby amended to read as follows:
R102.4 Referenced codes and standards. The codes as adopted and amended by Town of Estes Park and
standards referenced in this code shall be considered part of the requirements of this code to the prescribed extent
of each such reference and as further regulated in Sections R102.4.1 and R102.4.2.
Exception: Where enforcement of a code provision would violate the conditions of the listing of the equipment or
appliance, the conditions of the listing and manufacturer’s instructions shall apply.
The following section is hereby amended to read as follows:
R103.1 Creation of enforcement agency. The Building Division is hereby created and the official in charge thereof
shall be known as the Chief Building Official, hereinafter referred to as the building official.
The following section is hereby amended to read as follows:
R103.2 Appointment. The building official shall be appointed by the Community Development Department Director.
The following section is hereby amended to read in its entirety as follows (items 1 through 5 are deleted):
R104.10.1 Flood Hazard areas. The Town Engineer shall not grant modifications to any provisions required in flood
hazard areas as established by the Town of Estes Park Land Use Code without the granting of a variance to such
provisions if allowed and as described under the Code.
The following section is hereby amended to read as follows:
R105.1 Required. Any owner or owner’s authorized agent who intends to construct, enlarge, alter, repair, move,
demolish or change the occupancy of a building or structure, including bridges and culverts, or to erect, install,
enlarge, alter, repair, remove, convert or replace any electrical, gas, mechanical or plumbing system, the installation
of which is regulated by this code, or to cause any such work to be done, shall first make application to the building
official and obtain the required permit.
The following section is hereby amended by amending items 1, 3, 8 & 10 and adding items 11-16 to read as
follows:
R105.2 Work exempt from permit. Exemption from permit requirements of this code shall not be deemed to grant
authorization for any work to be done in any manner in violation of the provisions of this code or any other laws or
ordinances of this jurisdiction. Permits shall not be required for the following:
1
Building:
1. One-story detached accessory structures used as storage sheds, playhouses, and similar non-habitable uses,
2
provided that the floor area does not exceed 200 square feet (18.58 m) and there are no utilities.
2. Fences not over 7 feet (2134 mm) high.
3. Retaining walls that are not over 4 feet (1219 mm) in height measured from a point eight feet horizontally
downslope from the low side finish grade to the high side finish grade behind the wall, provided that the
horizontal distance to the next uphill retaining wall is at least equal to twice the height of the upper wall, unless
supporting a surcharge or impounding Class I, II or IIIA liquids. \[See Figure 105.2.3\]
4. Water tanks supported directly upon grade if the capacity does not exceed 5,000 gallons (18,927 L) and the
ratio of height to diameter or width does not exceed 2 to 1.
5. Sidewalks and driveways.
6. Painting, papering, tiling, carpeting, cabinets, counter tops and similar finish work.
7. Prefabricated swimming pools that are less than 24 inches (610 mm) deep.
8. Swings and other playground equipment, including one elevated playhouse per lot, designed, and used
2
exclusively for play, not exceeding 64 square feet (5.9 m) of floor area nor 8 feet (2.44 m) in height measured
from the floor to the highest point of such structure.
9. Window awnings supported by an exterior wall that do not project more than 54 inches (1372 mm) from the
exterior wall and do not require additional support.
10. Decks that are not more than 30 inches (762 mm) above grade at any point and do not serve the exit door
required by Section R311.2.
2
) of covering per
11. Roofing repair or replacement work not exceeding one square (100 square feet (9.29m
building.
12.Window replacement requiring no structural alterations. (Replacement windows must meet Appendix J
requirements.)
13.Replacement of non-structural siding that is not part of a fire-rated assembly when the removal of siding is
performed in accordance with State laws regarding asbestos and lead paint. (Replacement siding must meet
Wildfire Hazard Area and other code requirements.)
14. Shade cloth and maximum 6 mil single layer poly-roofed structures, constructed for nursery or agricultural
purposes, with no entry by the general public, not including service systems.
15. Public bridges, private culverts and pedestrian bridges that serve only one property, do not provide a means of
egress or access to the property, and are not in a regulatory floodplain or county-designated major drainage
area of interest (see map at https://www.larimer.org/engineering/stormwater-drainage)
16. Pergolas, arbors or trellises whose roof area is at least 67% open.
The following section is hereby amended by amending Item # 2 under Plumbing: to read as
follows: R105.2. Work exempt from permit.
Plumbing:
1.The stopping of leaks in drains, water, soil, waste or vent pipe; provided, however, that if any concealed trap,
drainpipe, water, soil, waste or vent pipe becomes defective and it becomes necessary to remove and replace the
2
same with new material, such work shall be considered as new work and a permit shall be obtained and inspection
made as provided in this code.
2. The clearing of stoppages or the repairing of leaks in pipes, valves or fixtures, and the removal and replacement of
plumbing fixtures, provided such repairs or replacements do not involve or require the replacement or rearrangement
of valves, pipes or fixtures.
The first paragraph in the following section is hereby amended to read as follows. The remainder is
unchanged:
R105.3.1.1 Determination of substantially improved or substantially damaged existing buildings in flood
hazard areas. For applications for reconstruction, rehabilitation, addition, or other improvement of existing buildings
or structures located in a flood hazard area as established by the Town of Estes Park Land Use Code, the Town
Engineer shall examine or cause to be examined the construction documents as well as other documents necessary
for a determination of substantial improvement or substantial damage. The Town Engineer shall make a determination
with regard to the value of the proposed work. For buildings that have sustained damage of any origin, the value of the
proposed work shall include the cost to repair the building or structure to its pre-damaged condition. If the Town
Engineer finds that the proposed work constitutes a substantial improvement or repair of substantial damage in
accordance with the Town of Estes Park Land Use Code, the building or structure shall meet the requirements of
Section R322.1.
The following section is hereby amended to read as follows:
R105.5 Expiration. Every permit issued shall expire 18 months after the date of issue unless the project is
completed in compliance with this code. The building official is authorized to grant, for justifiable cause
demonstrated. a one-time written extension of 18 months at no charge, making the original permit valid for three
years. Additional 18-month extensions will cost one-half the amount of the original building permit fee or a minimum
of $50, whichever is more. Every permit shall become null and void if the building or work authorized by such permit
is not commenced within 180 days from the date of issue of such permit, if the person or entity to whom the permit is
issued fails to request a first inspection within 180 days of the date of such permit, or if the building or work
authorized by such permit is suspended or abandoned at any time after the work is commenced for a period of 180
days or more. Before such work can be recommenced, a new permit shall be first obtained to do so. The fee for such
new permit shall be one-half of the amount required for a new permit for such work, provided no changes have been
made or will be made in the original plans and specifications for such work and provided further that the suspension
or abandonment has not exceeded one year. Changes in the plans and specifications or abandonment exceeding
one year shall require an additional permit fee and plan review fee as described in Section R108. Permits for “as-
built” construction must have final inspection approval within 180 days of permit issuance. The building official is
authorized to grant a one-time extension of twelve months for “as-built” permits, at no charge, provided evidence of
progress towards final inspection or justifiable cause is shown.
The following section is hereby added to read as follows:
R105.10 Premises Identification During Construction. The approved permit number and street address number
shall be displayed and be plainly visible and legible from the public street or road fronting the property on which any
new building is being constructed.
The following section is hereby amended to read as follows:
R106.1.3 Information on braced wall design. For buildings and structures utilizing braced wall design, braced wall
lines shall be identified on the construction documents. Pertinent information including, but not limited to, bracing
methods, location and length of braced wall panels and foundation requirements of braced wall panels at top and
bottom shall be provided.
The following section is hereby amended by deleting item #3 and renumbering and amending #4 to read as
follows:
R106.1.4 Information for construction in flood hazard areas. For buildings and structures located in whole or in
part in flood hazard areas as established by Table R301.2, construction documents shall include:
1. Delineation of flood hazard areas, floodway boundaries and flood zones and the design flood elevation, as
appropriate.
2. The elevation of the proposed lowest floor, including basement; in areas of shallow flooding (AO zones), the
height of the proposed lowest floor, including basement, above the highest adjacent grade.
3. If design flood elevations are not included on the county’s Flood Insurance Rate Map (FIRM), the Town
Engineer and the applicant shall obtain and reasonably utilize any design flood elevation and floodway data
available from other sources.
3
The following section is hereby amended to read as follows:
R106.3.1 Approval of construction documents. Where the building official issues a permit, the construction
documents shall be approved in writing, electronically, or by a stamp indicating the approved permit number. One set
of construction documents so reviewed shall be retained by the building official. The other set shall be returned to the
applicant, shall be kept at the site of work and shall be open to inspection by the building official or a duly authorized
representative.
The following section is hereby amended to read as follows:
R107.1 General. The building official is authorized to issue a permit for temporary structures and temporary uses.
Such permits shall be limited as to time of service but shall not be permitted for more than 18 months. The building
official is authorized to grant extensions for demonstrated cause.
The following section is hereby added to read as follows:
R108.7 Expiration of Plan Review. Applications for which no permit is issued within one hundred and eighty (180)
days following the date of application shall expire by limitation; plans submitted for review may thereafter be returned
to the applicant or destroyed by the building official. The building official may extend the time for action by the
applicant for a period not exceeding ninety (90) days upon written request by the applicant showing that
circumstances beyond the control of the applicant have prevented action from being taken. In order to renew action
on an expired application, the applicant shall resubmit plans and pay a new plan review fee.
The following section is hereby added to read as follows:
R108.8 Re-inspections. A re-inspection fee may be assessed for each inspection or re-inspection when access to
the work is not provided on the date for which inspection is requested, a readily visible address is not posted, the
inspection record card is not posted or otherwise available on site, the approved plans are not readily available in a
visible location for the inspector, such portion of work for which inspection is called for is not complete, corrections
called for are not made, work deviates from plans approved by the building official, or for other good and sufficient
cause as determined by the building official. To obtain a re-inspection, the applicant shall pay the re-inspection fee in
accordance with the adoptedTown of Estes Park fee schedule. When re-inspection fees have been assessed, no
additional inspection of the work will be performed until the required fees have been paid.
R109.1.1 Foundation inspection. Inspection of the foundation shall be made after poles or piers are set or trenches
or basement areas are excavated, and any required forms erected, and any required reinforcing steel is in place and
supported prior to the placing of concrete. The foundation inspection shall include excavations for thickened slabs
intended for the support of bearing walls, partitions, structural supports, or equipment and special requirements for
wood foundations.
The following section is hereby added to read as follows:
109.1.1.1 Underground inspection. Underground and underslab inspections shall be made after trenches or
ditches are excavated and bedded, piping, tubing, ducts, and electrical wiring is installed, before backfill is put in
place and before concrete is placed. Where excavated soil contains rocks, broken concrete, frozen chunks, and
other rubble that would damage or break the piping or cause corrosive action, clean backfill shall be on the job site.
The following section is hereby added to read as follows:
109.1.1.2 Energy efficiency inspections. Inspections shall be made to determine compliance with Chapter 11 and
shall include, but not be limited to, inspections for footing, foundation, slab, and thermal envelope insulation R- and
U-values, fenestration U-value, duct system R-value, HVAC and water-heating equipment efficiency, air sealing,
plumbing protection, lighting system controls, components and meters, and installation and proper operation of all
required building controls.
The following section is hereby amended to read as follows:
R109.1.2 Plumbing, mechanical, gas and electrical systems inspection. Rough inspection of plumbing,
mechanical, gas and electrical systems shall be made prior to covering or concealment, before fixtures or appliances
are set or installed, and prior to or concurrent with framing inspection.
Exception: Backfilling of ground-source heat pump loop systems tested in accordance with Section M2105.28 prior
to inspection shall be permitted.
The following section is hereby amended to read as follows:
R109.1.3 Floodplain inspections. For construction in flood hazard areas as established by the Town of Estes Park
Land Use Code, upon placement of the lowest floor, including basement, and prior to further vertical construction,
4
the building official and/or the Town Engineer may require submission of documentation, prepared and sealed by a
registered professional land survey or design professional, of the elevation of the lowest floor, including basement,
required in Section R322.
The following section is hereby amended to read as follows:
R109.1.4 Frame and masonry inspection. Inspection of framing and masonry construction shall be made after the
roof, masonry, framing, firestopping, draftstopping and bracing are in place and after the plumbing, mechanical, gas,
radon mitigation and electrical rough-ins are completed and prior to concealment.
The following section is hereby amended to read as follows:
R110.1 Use and change of occupancy. A building or structure shall not be used or occupied in whole or in part, and
a change of occupancy of a building or structure or portion thereof shall not be made, until the building official has
issued a certificate of occupancy therefor as provided herein. Issuance of a certificate of occupancy shall not be
construed as an approval of a violation of the provisions of this code or of other ordinances of the jurisdiction.
Certificates presuming to give authority to violate or cancel the provisions of this code or other ordinances of the
jurisdiction shall not be valid.
Exceptions:
1. Certificates of occupancy are not required for work exempt from permits under Section R105.2.
2. Cabins, agricultural and accessory buildings or structures, and work authorized under miscellaneous permits
shall not receive certificates of occupancy; a letter of completion will be issued upon request.
The following section is hereby amended to read as follows:
R110.4. Temporary occupancy. The building official is authorized to issue a temporary certificate of occupancy
before the completion of the entire work covered by the permit, provided that such portion or portions shall be
occupied safely. A Temporary Certificate of Occupancy (TCO) shall be valid for 180 days. The fee for a TCO shall be
in accordance with the fee schedule as established byTown of Estes Park. The building official may grant additional
TCOs for justifiable cause.
The following section is hereby amended to read as follows:
R112.4 Administration. To appeal a written determination of the building official to the Board of Appeals, a written
appeal must be received by theTown of Estes Park Building Division within thirty (30) days of the date of the
determination being appealed. The appellant shall, at the time of making such appeal, pay to theTown of Estes Park
Building Division a docket fee as specified in the Town of Estes Park fee schedule. TheTown of Estes Park Building
Division shall send written notice of hearing to all parties concerned at least fourteen (14) days prior to the hearing by
mailing the same to such parties' last known address by regular mail. The building official shall take immediate action
in accordance with the decision of the Board of Appeals. All meetings or hearings shall be open to the public. The
Board of Appeals may, from time to time, adopt such additional rules and regulations as it deems necessary and
advisable for the conduct of its hearings and for carrying out the provisions hereof.
CHAPTER 2 DEFINITIONS
The following section is hereby amended by adding or amending these terms to read as follows:
R202 DEFINITIONS
CABIN. A structure that contains at least one habitable room for living, sleeping, eating, or cooking that lacks one of
the following: an approved electrical system, an approved sanitation system, a potable water system, a water heater,
or a primary heat source.
FIREPLACE INSERT. A woodburning device designed to be installed in an existing fireplace.
INTERNATIONAL FIRE CODE. The International Fire Code as adopted, amended, and administered by and within a
fire district.
NON-RESTRICTED AREA.That part of unincorporatedTownof Estes Parklocated west of Range 71, or north of the
north half ofTownship 10 and east of Range 72 as shown on the Town of Estes Park Fireplace Area Map.
PRIMARY HEAT SOURCE. A permanent heating system capable of maintaining room temperatures at 68 degrees
Fahrenheit at a point three feet above the floor and two feet from exterior walls in all habitable rooms at all times,
even when the structure is unoccupied.
5
RESORT LODGE COTTAGES–A building or group of buildings, under single management and ownership,
containing rooms and/or dwelling units available for temporary rental to guests where the primary attraction is
generally recreational features or activities.
RESTRICTED AREA. That part of unincorporatedTownof Estes Parklocated outside the Non-restrictedArea as
shown on the Townof Estes ParkFireplace Area Map.
SOLIDLY SHEATHED DECK.A roof deck with gaps between planks or sheathing not exceeding 1/8 inch (3.18 mm).
TRANSIENT. Occupancy of a dwelling unit or sleeping unit for not more than 30 days.
WOODSTOVE. An appliance designed for or capable of burning wood and capable of and intended for domestic
space heating or domestic water heating.
CHAPTER 3 BUILDING PLANNING
The following table is hereby amended to read as follows:
TABLE R301.2 CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA
(These criteria shall be used for mechanical load calculations and designs.)
6
For SI: 1 pound per square foot = 0.0479 kPa, 1 mile per hour = 0.447m/s.
n
MANUAL J DESIGN CRITERIA
Elevation Altitude Summer Indoor Indoor Outdoor Heating
winter winter
Correction Design Winter Temperature
design design
Factor wet blub Design Difference
dry-bulb dry-bulb
Relative
temperature temperature
Humidity
oooo
4,790 to varies with 62F 30% 72F 4F 68F
13,573 elevation
Latitude Climate Daily Indoor Indoor Outdoor Cooling
summer summer summer
Zone Range Temperature
design design design
Difference
relative dry-bulb dry-bulb
humidity temperature temperature
oooo
40 15’ to 5B High (H) 50% 75F 91 F 16 F
o
40 59’
North
Footnotes to Table 301.2 are hereby amended to read as follows:
a. Where weathering requires a higher strength concrete or grade of masonry than necessary to satisfy the structural
requirements of this code, the frost line depth strength required for weathering shall govern. The weathering column shall be
filled in with the weathering index, "negligible," "moderate" or "severe" for concrete as determined from Figure R301.2(1). The
grade of masonry units shall be determined from ASTM C34, ASTM C55, ASTM C62, ASTM C73, ASTM C90, ASTM C129,
ASTM C145, ASTM C216 or ASTM C652.
b. Where the frost line depth requires deeper footings than indicated in Figure R403.1(1), the frost line depth strength required
for weathering shall govern. The jurisdiction shall fill in the frost line depth column with the minimum depth of footing below
finish grade.
c. The jurisdiction shall fill in this part of the table to indicate the need for protection depending on whether there has been a
history of local subterranean termite damage.
d. The Ultimate Design Wind Speed (V ult) for the determination of site wind loads shall comply with the Colorado Front Range
Gust Map – ASCE 7-10 Compatible, published by the Structural Engineers Association of Colorado (dated November 8, 2013)
or theTown of Estes Park Ultimate Design Wind Speed Map. Wind Load design values shall be determined from Section 1609
of the IBC. Wind exposure category shall be Exposure C unless designated otherwise by the design professional based on
site-specific conditions and approved by the building official.
e. The jurisdiction shall fill in this section of the table to establish the design criteria using Table 10A from ACCA Manual J or
established criteria determined by the jurisdiction. Deviations from this table shall be permitted to reflect local climates or local
weather experience as determined by the building official.
f. The jurisdiction shall fill in this part of the table with the seismic design category determined from Section R301.2.2.1.
g. The jurisdiction shall fill in this part of the table with: (a) the date of the jurisdiction’s entry into the National Flood Insurance
Program (date of adoption of the first code or ordinance for management of flood hazard areas); (b) the date(s) of the Flood
Insurance Study and (c) the panel numbers and dates of the currently effective FIRMs and FBFMs or other flood hazard map
adopted by the authority having jurisdiction, as amended.
h. In accordance with Sections R905.1.2, R905.4.3.1, R905.5.3.1, R905.6.3.1, R905.7.3.1 and R905.8.3.1, where there has
been a history of local damage from the effects of ice damming, the jurisdiction shall fill in this part of the table with “YES.”
Otherwise, the jurisdiction shall fill in this part of the table with “NO.”
i. The jurisdiction shall fill in this part of the table with the 100-year return period air freezing index (BF-days) from Figure
R403.3(2) or from the 100year (99 percent) value on the National Climatic Data Center data table "Air Freezing Index-USA
Method (Base 32°F)."
j. The jurisdiction shall fill in this part of the table with the mean annual temperature from the National Climatic Data Center data
table "Air Freezing
Index-USA Method (Base 32°F)."
k. In accordance with Section R301.2.1.5, where there is local historical data documenting structural damage to buildings due to
topographic wind speed-up effects, the jurisdiction shall fill in this part of the table with "YES." Otherwise, the jurisdiction shall
indicate "NO" in this part of the table.
l. In accordance with Figure R301.2(2), where there is local historical data documenting unusual wind conditions, the jurisdiction
shall fill in this part of the table with “YES” and identify any specific requirements. Otherwise, the jurisdiction shall indicate
“NO” in this part of the table.
7
m. In accordance with Section R301.2.1.2 the jurisdiction shall indicate the wind-borne debris wind zone(s). Otherwise, the
jurisdiction shall indicate
“NO” in this part of the table.
n. The jurisdiction shall fill in these sections of the table to establish the design criteria using Table 1a or 1b from ACCA Manual J
or established criteria determined by the jurisdiction. Alternative design criteria based on site-specific data may be used when
proposed by the registered design professional and approved by the building official.
o.The design ground snow load Pshall comply with the column above or the Colorado Design Snow Loads,published by the
g
Structural Engineers Association of Colorado (dated April 2016). The design roof snow load values shall be determined from
Chapter 7, ASCE 7-16, including all applicable factors, and loading and drifting considerations. In no case shall the final
design roof snow load be less than a uniformly distributed load of 30 psf, except greenhouses may take full load reductions
allowed per ASCE 7. Loafing sheds and pole barns may be constructed perTown of Estes Park Prescriptive Design
Standards.
The following section is hereby amended to read as
follows: R301.2.1.1 Wind limitations and wind design
required.
The wind provisions of this code shall not apply to the design of buildings where the ultimate design wind speed, V,
ult
as determined in compliance with the Colorado Front Range Gust Map – ASCE 7-10 Compatible, published by the
Structural Engineers Association of Colorado (dated November 8, 2013), equals or exceeds 140 miles per hour (225
kph).
Exceptions:
1. For concrete construction, the wind provisions of this code shall apply in accordance with the limitations of
Sections R404 and R608.
2. For structural insulated panels, the wind provisions of this code shall apply in accordance with the limitations of
Section R610.
3. For cold-formed steel light-frame construction, the wind provisions of this code shall apply in accordance with
the limitations of Sections R505, R603 and R804.
Where the ultimate design wind speed, V, as determined above equals or exceeds 140 miles per hour (225 km/h),
ult
the design of buildings for wind loads shall be in accordance with one or more of the following methods:
1. AWC Wood Frame Construction Manual (WFCM).
2. ICC Standard for Residential Construction in High-Wind Regions (ICC 600).
3. ASCE Minimum Design Loads for Buildings and Other Structures (ASCE 7).
4. AISI Standard for Cold-Formed Steel Framing—Prescriptive Method for One- and Two-Family Dwellings (AISI
S230).
5. International Building Code.
6. Town of Estes Park Prescriptive Design Standards for Pole Barns in High Wind Areas.
7. Town of Estes Park Prescriptive Design Standards for Loafing Sheds.
8. Any other Prescriptive Design Standards for High Wind or Heavy Snow Areas subsequently issued byTown of
Estes Park.
The elements of design not addressed by the methods in Items 1 through 8 shall be in accordance with the
provisions of this code.
Where ASCE 7 or the International Building Code is used for the design of the building, the Colorado Front Range
Gust Map – ASCE 7-10 Compatible, published by the Structural Engineers Association of Colorado (dated
November 8, 2013), and exposure category requirements as specified in ASCE 7 and the International Building
Code shall be used.
8
The following section is hereby amended to read as follows:
R302.1 Exterior walls. Construction, projections, openings, and penetrations of exterior walls of dwellings and
accessory buildings shall comply with Table R302.1 (1); or dwellings equipped throughout with an automatic
sprinkler system installed in accordance with Section P2904 shall complywith Table R302.1 (2). Exceptions:
1.Walls, projections, openings, or penetrations in walls perpendicular to the line used to determine the fire
separation distance.
2.Walls of individual dwelling units and their accessory structures located more than six feet (1.8 m) apart on the
same lot.
3.Detached tool sheds and storage sheds, playhouses and similar structures exempted from permits are not
required to provide wall protection based on location on the lot. Projections beyond the exterior wall shall not
extend over the lot line.
4.Foundation vents installed in compliance with this code are permitted.
The following Table is hereby amended to read as follows:
Table R302.1 (1) Exterior Walls
TABLE R302.1 (1) EXTERIOR WALLS
MINIMUM FIRE
EXTERIOR WALL ELEMENT MINIMUM FIRE-RESISTANCE RATING
SEPARATION DISTANCE
1 hour-tested in accordance with ASTM E119,
UL 263 or Section 703.2.2 of the International
Fire-resistance rated 0 feet
Building Code with exposure from both sides
Walls
Not fire resistance rated 0 hours 3 feet
Not allowed NA Less than 2 feet
Projections
1 hour on the underside, or heavy timber, or 2 feet
Fire-resistance rated
a, b
fireretardant treated wood
9
Not fire resistance rated 0 hours 3 feet
Not allowed NA Less than 3 feet
Openings in
walls
Unlimited 0 hours 3 feet
Comply with Section R302.4 Less than 3 feet
All
Penetrations
None required 3 feet
For SI: 1 foot = 304.8 mm. NA = Not Applicable.
a. The fire-resistance rating shall be permitted to be reduced to 0 hours on the underside of the eave overhang if fireblocking is
provided from the wall top plate to the underside of the roof sheathing.
b. The fire-resistance rating shall be permitted to be reduced to 0 hours on the underside of the rake overhang where gable vent
openings are not installed.
The following Table is hereby amended by deleting footnote a and renumbering footnotes b and c to read as
follows:
Table R302.1 (2) Exterior Walls – Dwellings with Fire Sprinklers
a. The fire-resistance rating shall be permitted to be reduced to 0 hours on the underside of the eave overhang if fireblocking is
provided from the wall top plate to the underside of the roof sheathing.
b. The fire-resistance rating shall be permitted to be reduced to 0 hours on the underside of the rake overhang where gable vent
openings are not installed.
The following section is hereby amended to read as follows:
R302.5.1 Opening protection. Openings from a private garage, barn, or similar utility space directly into a room
used for sleeping purposes shall not be permitted. Other openings between the garage, barn or similar utility space
and residence shall be equipped with solid wood doors not less than 1 3/8 inches (35 mm) in thickness, solid or
honeycomb-core steel doors not less than 1 3/8 inches (35 mm) thick, or 20-minute fire-rated doors. Doors shall be
self-latching and equipped with a self-closing or automatic-closing device.
The following section is hereby amended to read as follows:
R302.6 Dwelling-garage/barn/utility space fire separation. The garage, barn or similar utility space shall be
separated as required by Table R302.6. Openings in such walls shall comply with Section R302.5. Attachment of
gypsum board shall comply with Table R702.3.5. This provision does not apply to walls of utility spaces that are
perpendicular to the adjacent dwelling unit wall.
The following section is hereby added to read as follows:
2
R302.6.1 Private garages, barns and similar utility buildings exceeding 5,000 sq. ft. (464.5 m) in floor area within 6’
(1.8 m) at any point from a dwelling unit on the same lot shall be separated from the dwelling by 1-hour fire-rated
wall, roof and soffit construction.
The following section is hereby amended to read as follows:
TABLE R302.6 DWELLING-GARAGE/BARN/SIMILAR UTILITY SPACE SEPARATION
SEPARATION MATERIAL
From the residence and attics Not less than 1/2-inch gypsum board or equivalent applied to the utility
space side
From all habitable rooms above the utility spaceNot less than 5/8-inch Type X gypsum board or equivalent
Structure(s) supporting floor/ceiling assemblies used Not less than 1/2-inch gypsum board or equivalent
for separation required by this section
Garages/barns/similar utility buildings located less Not less than 1/2-inch gypsum board or equivalent applied to the interior
a
than 6 feet from a dwelling unit on the same lot side of exterior walls and roof/ceiling assemblies that are within this area
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
2
a. Garages, barns, and similar utility buildings exceeding 5,000 sq. ft. (464.5 m) in floor area shall comply with Section R302.6.1
The following section is hereby amended in its entirety to read as follows:
10
R302.13 Fire protection of floors above fuel-burning appliances. In new construction or a new location for an
appliance, where fuel-fired heating or water-heating appliances are installed below a combustible floor, floor
assemblies that are not required elsewhere in this code to be fire-resistance rated shall be provided with a minimum
½ inch (12.7 mm) gypsum wallboard membrane, 5/8-inch (16 mm) wood structural panel membrane, or equivalent
on the underside of the floor framing member. Penetrations or openings for ducts, vents, electrical outlets, lighting,
devices, luminaires, wires, speakers, drainage, piping and similar openings or penetrations shall be permitted.
Exceptions:
1. Floor assemblies located directly over a space protected by an automatic sprinkler system in accordance with
Section P2904, NFPA 13D, or other approved equivalent sprinkler system.
2. Floor assemblies located above direct vent appliances with both intake and exhaust pipes installed continuously
to the outside.
3. Portions of floor assemblies shall be permitted to be unprotected where complying with all of the following:
3.1. The appliances are enclosed in a framed mechanical room with no less than ½” (12.7 mm) gypsum
wallboard or the equivalent installed on the ceiling and walls. Clearances to combustible materials and for
appliance access and service, as specified in this code and the manufacturer’s installation instructions, shall
be maintained.
2
3.2. The aggregate area of the room does not exceed 80 square feet (7.4 m) per story.
3.3. Fireblocking in accordance with Section R302.11.1 is installed along the perimeter of the mechanical room.
3.4. The room is insulated and sealed in accordance with Section N1102.4.4.
3.5. Openings from a mechanical room directly into a room used for sleeping purposes are prohibited. Other
3/8 inches (35 mm) in thickness, solid or
openings shall be equipped with solid wood doors not less than 1
honeycomb-core steel doors not less than
1 3/8 inches (35 mm) thick, or 20-minute fire-rated doors. Doors shall be self-latching and equipped with a self-
closing or automatic-closing device.
4. Wood floor assemblies using dimension lumber or structural composite lumber equal to or greater than 2-inch by
10-inch (50.8 mm by 254 mm) nominal dimension, or other approved floor assemblies demonstrating equivalent
fire performance.
The following section is hereby amended to read as follows:
R303.10 Required heating. Every dwelling unit shall be provided with a primary heat source capable of maintaining
a minimum room temperature of 68ºF (20ºC) at a point three feet (914 mm) above the floor and two feet (610 mm)
from exterior walls in all habitable rooms at the design temperature.
The following section is hereby amended to read as follows:
R308.4.7 Glazing adjacent to stair landings. Glazing adjacent to the landings at the bottom of a stairway where the
glazing is less than 36 inches (914 mm) above the landing and within a 60 inch (1524 mm) horizontal arc less than
180 degrees from the top or bottom tread nosing shall be considered a hazardous location.
Exception: Where the glazing is protected by a guard complying with Section R312 and the plane of the glass is
more than 18 inches (457 mm) from the guard.
The following section including exceptions is hereby amended to read as follows:
habitable lofts and
R310.1 Emergency escape and rescue opening required. Basements, habitable attics,
mezzanines, and every sleeping room shall have not less than one operable emergency escape and rescue
opening. Where basements contain one or more sleeping rooms, an emergency escape and rescue opening shall be
required in each sleeping room. Emergency escape and rescue openings shall open directly into a public way, or to
a yard or court having a minimum width of 36 inches (914 mm) that opens to a public way.
Exceptions:
1. Storm shelters and basements used only to house mechanical equipment not exceeding a total floor area of 200
2
).
square feet (18.58 m
2. A yard shall not be required to open directly into a public way where the yard opens to an unobstructed path
from the yard to the public way. Such path shall have a width of not less than 36 inches (914 mm).
The following section is hereby amended to read as follows:
R310.2.2 Minimum dimensions. The minimum net clear opening height dimension shall be 24 inches (610 mm).
The minimum net clear opening width dimension shall be 20 inches (508 mm). The net clear opening dimensions
shall be the result of normal operation of the opening, with casement windows measured when open perpendicular
to the exterior wall.
11
The following section is hereby amended to read as follows:
R310.7.1 Existing emergency escape and rescue openings. Where a change of occupancy would require an
emergency escape and rescue opening in accordance with Section 310.1, operable windows serving as the
emergency escape and rescue opening shall comply with the following:
2
1. An existing operable window shall provide a minimum net clear opening of 5 square feet (0.46 m) with a
minimum net clear opening height of 22 inches (559 mm) and a minimum net clear opening width of 20 inches
(508 mm).
2. A replacement window where such window complies with both of the following:
2.1. The replacement window meets the size requirements in Item 1.
2.2. The replacement window is the manufacturer’s largest standard-size window that will fit within the existing
frame or existing rough opening. The replacement window shall be permitted to be of the same operating
style as the existing window or a style that provides for an equal or greater window opening area than the
existing window.
The first sentence in the following section is hereby amended to read as follows (the remainder is
3
unchanged): R311.7.5.1 Risers. The riser height shall be not more than 7/inches (196 mm) and not less than
4
4 inches (102 mm).
The following section is hereby added to read as follows:
R312.1.1.1 Area wells, bulkheads, and similar enclosures. Where any area well wall, bulkhead enclosure wall or
similar retaining wall or barrier is located less than 36 inches (914 mm) from the nearest intended walking surface,
parking surface, or driveway, and the surface elevation difference between the higher and lower side of the well wall,
bulkhead enclosure wall or retaining wall is greater than 30 inches, such wall shall be protected with guards or be
provided with an equivalent barrier.
EXCEPTIONS:
1. The access side of stairways need not be barricaded.
2. Area wells provided for emergency escape and rescue windows may be protected with approved grates or
covers that comply with Section 310.4.4.
3. Covers and grates may be used over stairways and other openings used exclusively for service access or for
admitting light or ventilation.
4. Area well walls, bulkhead enclosure walls, or retaining walls adjacent to a building that are located 24 inches
(610 mm) or less measured perpendicular from the building.
5. Where the slope of the embankment or the side of the opening enclosure adjacent to such wall does not
exceed one unit vertical to two horizontal.
The following section is hereby amended in its entirety to read as follows:
SECTION R313
AUTOMATIC FIRE-SPRINKLER SYSTEMS
R313.1Townhouse automatic fire sprinkler design. An automatic sprinkler system shall be installed in
Townhouses.
Exception: An automatic sprinkler system shall not be required for additions or alterations to existing buildings that
are not already provided with a sprinkler system.
R313.1.1 Design and installation. Automatic sprinkler systems forTownhouses shall be designed and installed in
accordance with Section P2904 or NFPA 13D.
Exception:
Within the Estes Valley Fire Protection District, automatic sprinkler systems for Townhouses shall be designed and
installed in accordance with NFPA 13D.
R313.2 One- and two-family dwellings automatic fire sprinkler design. An automatic fire sprinkler system shall
be installed in all one- and two-family dwellings.
Exception: An automatic sprinkler system shall not be required for additions or alterations to existing buildings that
are not already provided with a sprinkler system.
R313.2.1 Design and installation.
Automatic sprinkler systems shall be designed and installed in accordance with Section P2904 or NFPA 13D.
Exception:
Within the Estes Valley Fire Protection District, automatic fire sprinkler systems for one- and two-family dwellings
shall be designed and installed in accordance with NFPA 13D.
The following section is hereby amended by deleting exception #2 to read as follows:
12
R314.2.2 Alterations, repairs, and additions. Where alterations, repairs or additions requiring a permit occur, the
individual dwelling unit shall be equipped with smoke alarms located as required for new dwellings.
Exception: Work involving the exterior surfaces of dwellings, such as the replacement of roofing or siding, the
addition or replacement of windows or doors, or the addition of a porch or deck.
The following section is hereby amended by adding an Exception to read as follows:
R314.4 Interconnection. Where more than one smoke alarm is required to be installed within an individual dwelling
unit in accordance with Section R314.3, the alarm devices shall be interconnected in such a manner that the
actuation of one alarm will activate all of the alarms in the individual dwelling unit. Physical interconnection of smoke
alarms shall not be required where listed wireless alarms are installed and all alarms sound upon activation of one
alarm.
Exception: Smoke alarms required for installation, alteration, or repairs of plumbing or mechanical systems need
not be interconnected.
The following section is hereby amended to read as
follows: R315.2.1 New construction.
For new construction, carbon monoxide alarms shall be provided in dwelling units where either or both of the
following conditions exist.
1. The dwelling unit contains a fuel-fired appliance.
2. The dwelling unit has an attached garage.
The following section is hereby amended by deleting Exceptions #2 and #3 to read as follows:
R315.2.2 Alterations, repairs, and additions. Where alterations, repairs or additions requiring a permit occur,or
where one or more sleeping rooms are added or created in existing dwellings, the individual dwelling unit shall be
equipped with carbon monoxide alarms located as required for new dwellings.
Exception: Work involving the exterior surfaces of dwellings, such as the replacement of roofing or siding, the
addition or replacement of windows or doors, or the addition of a porch or deck.
The following section is hereby amended to read as follows:
R315.3 Location. Carbon monoxide alarms in dwelling units shall be installed outside of each separate sleeping
area in the immediate vicinity of the bedrooms and not more than fifteen feet (4.6 m) from the door to each bedroom.
Where a fuel-burning appliance is located within a bedroom or its attached bathroom, a carbon monoxide alarm shall
be installed within the bedroom.
The following section is hereby amended by adding Exception #2 and renumbering the existing Exception as
#1 to read as follows:
R315.5 Interconnectivity. Where more than one carbon monoxide alarm is required to be installed within an
individual dwelling unit in accordance with Section R315.3, the alarm devices shall be interconnected in such a
manner that the actuation of one alarm will activate all of the alarms in the individual dwelling unit. Physical
interconnection of carbon monoxide alarms shall not be required where listed wireless alarms are installed and all
alarms sound upon activation of one alarm.
Exceptions:
1. Interconnection of carbon monoxide alarms in existing areas shall not be required where alterations or repairs
do not result in removal of interior wall or ceiling finishes exposing the structure, unless there is an attic, crawl
space or basement available that could provide access for interconnection without the removal of interior
finishes.
2. Carbon monoxide alarms required for installation, alteration, or repairs of plumbing or mechanical systems.
The following section is hereby amended to read as follows:
R322.1 General. Buildings and structures constructed in whole or in part in flood hazard areas, including A Zones, as
established in theTown of Estes Park Land Use Code, and substantial improvement and repair of substantial damage
of buildings and structures in flood hazard areas, shall be designed and constructed in accordance with the provisions
contained in the Town of Estes Park Land Use Code.
13
The following section is hereby added to read as follows:
R331 WILDFIRE HAZARD MITIGATION REQUIREMENTS
R331.1 General Purpose. The purpose of this section is to establish minimum standards for design and
construction of new buildings or portions thereof for the protection of life and property from wildfire hazards.
R331.2 Scope.Within the wildfire hazard area, as defined herein and shown in Figure R331, all new building
construction including additions shall comply with the provisions of this section.
EXCEPTIONS:
2
1.Sheds, greenhouses, and similar detached accessory structures not exceeding 600 sq. ft. (55.7 m) in area.
2.Loafing sheds and similar unenclosed accessory structures of any size.
FIGURE R331 TownOF ESTES PARKWILDFIRE HAZARD AREA MAP
R331.3 Alternate Materials and Methods of Compliance. The provisions of this chapter are not intended to
prevent the use of any material or method of compliance not specifically prescribed by this chapter, provided any
alternate has been approved and its use authorized by the building official in accordance with Section 104.11.
14
R331.4 Definitions. For the purpose of this section, certain terms are defined as follows:
COMBUSTIBLE - a material that fails to meet the acceptance criteria of Standard Method of Test for Determination
of Noncombustibility in Building Materials (ASTM E136).
COMBUSTIBLE CONSTRUCTION - a type of construction that does not meet the requirement for noncombustible
construction.
DEFENSIBLE SPACE - a natural or man-made area, where woody vegetation capable of allowing a fire to spread
unchecked has been treated or modified to slow the spread and reduce the intensity of an advancing wildfire, and to
create an area for fire suppression operations to occur.
FIRE-RESISTIVE CONSTRUCTION - construction designed to resist the spread of fire.
FIRE-RESISTIVE RATING - the time that the material or construction will withstand the standard fire exposure as
determined by a fire test made in conformity with the standard methods of fire tests of buildings construction and
materials.
FLAME-SPREAD INDEX (FSI) - a relative index describing the surface-burning characteristics of building materials.
The test used to establish FSI evaluates the flame spread over the building material surface when exposed to a test
fire. The rate at which flame spreads across the specimen is compared on a scale of 0 for inorganic reinforced
cement board, to 100 for red oak. The following table identifies the Flame Spread Classification and Flame Spread
Index:
Flame Spread Classification Flame Spread Index
Class A 0 to 25
Class B 26 to 75
Class C 76 to 200
FUEL - combustible material.
NONCOMBUSTIBLE - materials that meet the acceptance criteria of Standard test Method for determination of non-
combustibility in building materials. (ASTM E136)
NONCOMBUSTIBLE CONSTRUCTION - a type of construction in which a degree of fire safety is attained by the
use of noncombustible materials for structural members and other building, assemblies.
ONE-HOUR FIRE-RESISTIVE CONSTRUCTION - will withstand the standard fire exposure for one hour as
determined by a fire test made in conformity with the standard methods of fire tests of building construction and
materials.
WILDFIRE HAZARD - the relative threat that a wildland fire may cause the destruction of life and improved property.
WILDFIRE HAZARD AREA - The area west of a line starting at the intersection of the Wyoming border line and
range 69 west, then
South nine miles to S.W. corner of section 31,Township 11, Range 69, then West three miles to N.W. corner of
Section 3,Township
10, Range 70, then South five miles to S.W. corner of Section 27,Township 10, Range 70, then East three miles to
S.W. corner of
Section 30,Township 10, Range 69, then South nine miles to S.W. corner of Section 7,Township 8, Range 69, then
West one mile to
N.W. corner of Section 13,Township 8, Range 70, then South four miles to S.W. corner of Section 36,Township 8,
Range 70, then
15
East two miles to N.W. corner of Section 6,Township 7, Range 69, then South three miles to S.W. corner of Section
17,Township 7,
Range 69, then East one mile to S.E. corner of Section 17,Township 7, Range 69, then South four miles to S.W.
corner of Section 4,
Township 6, Range 69, then East one mile to S.E. corner of Section 4,Township 6, range 69, then South four miles
to S.W. corner of Section 27,Township 6, Range 69, then West one mile to S.W. corner of Section 28,Township 6,
Range 69, then South three miles to intersection of U.S. Highway 34, then West following U.S. Highway 34 two miles
to intersection with Range 69 West, then South seven and three quarter miles to S.W. corner of Section 18,Township
4, Range 69, then West one mile to S.W. corner of Section 13,Township 4, Range 70, then South three miles to
where the S.W. corner of Section 36,Township 9, Range 70 meets the Boulder County Line.
WILDFIRE MITIGATION - action taken to eliminate or reduce the wildfire hazard.
R331.5 Fire-Resistive Construction. Fire-resistive construction on all new structures shall be one of the following
types:
1. One-hour fire-resistive shell providing not less than one-hour fire-resistive construction at all exterior walls,
excluding openings and decks.
2. Exterior siding materials with a flame-spread classification of Class C or better. Exterior siding shall be
composed entirely of noncombustible materials for a minimum of 4 feet (1.2 m) above finished grade.
EXCEPTION:
Non-combustible siding for the lowest 4 feet (1.2 m) is not required if 5 feet (1.5 m) or more of non-combustible
landscaping material or natural ground cover is provided in accordance with Section 331.6.
3. Log structures using solid logs with a minimum tip diameter of 6 inches (152.4 mm) for exterior wall construction
and 8 inches (203.2 mm) for roof beams, purlins and supporting columns.
R331.6 Defensible Space. Defensible space in compliance with current Colorado State Forest Service guidelines
shall be required on all new construction in the Wildfire Hazard Area. Any landscaping materials or natural ground
cover within 5 feet of the exterior walls of the building shall be non-combustible. For additions equal to or greater
than 50% of the total square footage of the original structure, or changes in the occupancy or use of existing
buildings that would place the building under the scope of Section R331.2, defensible space shall be provided
around the entire building.
EXCEPTION: Five feet of non-combustible landscaping material or natural ground cover is not required if the lowest
4 feet of siding is non-combustible in accordance with Section 331.5.
R331.7 Evaluation. Evaluation of the defensible space will
be based upon: 1. Current Colorado State Forest
Service standards and guidelines, and
2. Site specific vegetation and topographical characteristics.
The Building Official may allow alternatives to the Colorado State Forest Service Standards and Guidelines based on
specific site conditions.
R331.8 Completion. The defensible space must be approved prior to issuing a certificate of occupancy or letter of
completion.
R331.9 Liquid Propane Gas. Liquid propane gas facilities installed in the Wildfire Hazard Area shall comply with
current county requirements, the International Fire Code and NFPA 58, for installation of such facilities. Liquid
propane gas containers and tanks shall be located within the defensible space.
R331.10 Spark Arresters. Chimneys serving fireplaces, woodstoves, barbecues, incinerators, or decorative heating
appliances in which solid fuel or liquid fuel is used, shall be provided with a spark arrestor. Spark arrestors shall be
constructed of woven or welded wire screening of 12 USA standard gage wire (0.1046 inch) (2.66 mm) having
openings not exceeding ½ inch. The net free area of the spark arrestor shall not be less than four times the net free
area of the outlet of the chimney.
R331.11 Fees. Fees shall be assessed in accordance with the adoptedTown of Estes Park wildfire assessment and
inspection fee schedule.
R331.12 Appeals. Appeals of interpretations made by the building official relative to the application of this section
shall be made to the Board of Appeals in accordance with Section 112.
16
R331.13 Maintenance. Defensible space areas created as required by this code or other ordinances shall be
maintained by the property owner. No re-planting or new planting of trees, shrubs or other vegetation that would
violate the defensible space requirements of this section shall be permitted.
The following section is hereby added to read as follows:
SECTION 333 ADDITIONAL ENVIRONMENTAL REQUIREMENTS
R333.1 Passive radon mitigation system required. All new dwellings, and additions exceeding 1,000 sq. ft., shall
install a passive radon mitigation system. Such systems shall be designed and installed in accordance with Appendix
AF “Radon Control Methods.”
R333.2 Electric Vehicle readiness. All new dwelling units with an attached garage or carport shall be provided with
a continuous 50amp, 208/240-volt dedicated branch circuit for electric vehicle supply equipment that is terminated at
a receptacle or electric vehicle supply equipment in a readily accessible location at a likely vehicle parking space in
the garage or carport.
R333.3 Renewable energy readiness. All new dwelling units shall be provided with a continuous 50-amp, 208/240-
volt dedicated branch circuit installed from the attic space beneath the roof surface most likely to support a rooftop
photovoltaic or wind energy system, to a junction box within 12” (305 mm) (55.7 m2) of the dwelling’s electrical meter
or connected directly to the electrical panel board.
CHAPTER 4 FOUNDATIONS
The first two sentences in the following section are hereby amended to read as follows:
R401.1 Application. The provisions of this chapter shall control the design and construction of the foundation and
foundation spaces for all buildings. In addition to the provisions of this chapter, the design and construction of
foundations in areas prone to flooding as established by Table 301.2(1) shall be designed and constructed in
accordance with theTown of Estes Park Land Use Code. All foundations shall be designed by a qualified professional
licensed in the State of Colorado, in accordance with accepted and approved engineering practices, including
considerations for soil load-bearing capacities, surface and subsurface water conditions, adequate foundation and
floor drainage, adequate ventilation of enclosed interior foundation spaces, and foundation waterproofing and damp-
proofing.
Exceptions:
1. In subdivisions where engineered footings and foundations are not required by the conditions of approval.
2. Outside of subdivisions, where engineered design is not required by Sections R403.1.7 or R403.1.8.
3. Unenclosed patio covers and porches, decks, one-story agriculture pole buildings under 3000 square feet
2
), and accessory, unheated, detached one-story utility buildings with a maximum depth (truss length)
(278.7 m
of 24 feet (7.32 m), a maximum width not exceeding twice the depth, and a maximum area of 600 square feet
2
), when followingTownof Estes Park’s Prescriptive Design Standards.
(55.7 m
Wood foundations shall be designed and installed in accordance with AWC PWF.
Exception: The provisions of this chapter shall be permitted to be used for wood foundations only in the following
situations:
1. In buildings that have not more than two floors and a roof.
2. Where interior basement and foundation walls are constructed at intervals not exceeding 50 feet (15,240 mm).
The following section is hereby amended to add Exception #5 to
read as follows: R403.1.4.1 Frost Protection. Exceptions
17
5. An unheated, one-story accessory building may be placed on a slab-on-grade cast monolithically with a
footing placed at least 12 inches (9305 mm) below the undisturbed ground with one No. 5 bar or two No. 4
bars located in the middle of the footing depth. Such accessory building shall have a maximum depth (truss
length) of 24 feet (7.31 m), a maximum width not exceeding twice the depth, a maximum area of 600 square
2
feet (55.7 m) and shall be equipped with a controlled method of water disposal from roofs in accordance with
section R801.3.
The following section is hereby amended in its entirety to read as follows:
R403.1.8 Foundations on expansive soils. Foundation and floor slabs for buildings located on expansive soils
shall be designed in accordance with Section 1808.6 of the International Building Code.
Exception: Slab-on- grade foundation systems may be used for unheated, one-story accessory buildings in
accordance with Section R403.1.4.1 Exception 5.
The following section is hereby amended to read as follows:
R405.1 Concrete or masonry foundations. Drains shall be provided around concrete or masonry foundations that
retain earth and enclose habitable or usable spaces located below grade. Drainage tiles, gravel or crushed stone
drains, perforated pipe or other approved systems or materials shall be installed at or below the top of the footing or
below the bottom of the slab and shall discharge by gravity or mechanical means into an approved drainage system.
Gravel or crushed stone drains shall extend not less than 1 foot (305 mm) beyond the outside edge of the footing and
6 inches (152 mm) above the top of the footing and be covered with an approved filter membrane material. The top of
open joints of drain tiles shall be protected with strips of building paper. Except where otherwise recommended by the
drain manufacturer, perforated drains shall be surrounded with an approved filter membrane, or the filter membrane
shall cover the washed gravel or crushed rock covering the drain. Drainage tiles or perforated pipe shall be placed on
not less than 2 inches (51 mm) of washed gravel or crushed rock not less than one sieve size larger than the tile joint
opening or perforation and covered with not less than 6 inches (152 mm) of the same material. Exceptions:
1. A drainage system is not required where determined by the engineer of record that the foundation is installed on
well-drained ground or sand-gravel mixture soils according to the Unified Soil Classification System, Group I
soils, as detailed in Table R405.1.
2. A drainage system is not required for additions where the existing construction lacks a drainage system to
connect to.
The following section is hereby added to read as follows:
R408.3.1 Spaces under below-grade floors. Mechanical ventilation systems for spaces under below-grade floors
shall be designed by a professional engineer and installed in accordance with such designs or a mechanical
ventilation system for spaces under belowgrade floors shall be provided with an active, fan-assisted submembrane
depressurization system installed per APPENDIX AF, RADON CONTROL METHODS. In addition, the space above
the soil-gas-retarder and below the floor shall be provided with continuously operated mechanical exhaust ventilation
2
at a rate equal to 1 cubic foot per minute (0.47 L/s) for each 50 square feet (4.7 m) of underfloor area and either
mechanical supply air at the same rate, or an air pathway to the common area (such as a duct or transfer grille).
The following section is hereby amended to read as follows:
R408.7 Flood resistance. For buildings located in flood hazard areas as established in Table R301.2, the design
and construction of foundations shall be in accordance with theTown of Estes Park Land Use Code.
CHAPTER 5 FLOOR CONSTRUCTION
The following section is hereby amended to read as follows:
R502.6 Bearing. The ends of each joist, beam or girder shall have not less than 1 1/2 inches (38 mm) of bearing on
wood or metal, have not less than 3 inches of bearing (76 mm) on masonry or concrete or be supported by approved
joist hangers. The bearing on masonry or concrete shall be direct, or a sill plate of 2-inch-minimum (51 mm) nominal
thickness shall be provided under the joist, beam or girder. The sill plate shall provide a minimum nominal bearing
2
).
area of 48 square inches (30 865 mm
The following section is hereby amended to read as follows:
18
R507.3 Footings. Decks shall be supported on concrete footings or other approved structural systems designed to
accommodate all loads in accordance with Section R301. Deck footings shall be sized to carry the imposed loads
from the deck structure to the ground as shown in Figure R507.3.
Exceptions:
1.Footings shall not be required for free-standing decks consisting of joists directly supported on grade over their
entire length.
2.Footings shall not be required for free-standing decks that meet all of the following criteria:
2.1. The joists bear directly on precast concrete pier blocks at grade without support by beams or posts.
2.2. The area of the deck does not exceed 200 square feet (18.6 m2).
2.3. The walking surface is not more than 30 inches (762 mm) above grade at any point within 36 inches (914 mm)
measured horizontally from the edge.
CHAPTER 6 WALL CONSTRUCTION
The following section is hereby amended by deleting Exceptions #2 and #3 to read as follows:
R602.3.1 Stud size, height and spacing. The size, height and spacing of studs shall be in accordance with Table
R602.3(5). Exception: Utility grade studs shall not be spaced more than 16 inches (406 mm) on center, shall not
support more than a roof and ceiling, and shall not exceed 8 feet (2438 mm) in height for exterior walls and load-
bearing walls or 10 feet (3048 mm) for interior nonload-bearing walls.
The following Table is deleted in its entirety:
Table R602.3 (6) ALTERNATE WOOD BEARING WALL STUD SIZE, HEIGHT AND SPACING
The following section is hereby amended to read as follows:
R610.1 General. Structural insulated panel (SIP) walls shall be designed in accordance with the provisions of this
section. Plans for structural insulated panel walls, project drawings, typical details and specifications shall bear the
seal of the architect or engineer responsible for design.
CHAPTER 7 WALL COVERING
The following section is hereby amended to read as follows:
R702.7 Vapor retarders.Vapor retarder materials shall be classified in accordance with Table R702.7(1). A vapor
retarder may be provided on the interior side of frame walls of the class indicated in Table R702.7(2), including
compliance with Table R702.7(3) or R702.7(4) where applicable. Class I vapor retarders are not allowed on basement
foundation walls or any concrete or masonry below grade wall. An approved design using accepted engineering
practice for hygrothermal analysis shall be permitted as an alternative. The climate zone forTown of Estes Park, as
determined in accordance with Section N1101.7, is 5B.
Exception: Construction where accumulation, condensation or freezing of moisture will not damage the materials.
The following table is hereby amended to read in its entirety as follows:
TABLE R702.7(2) VAPOR RETARDER OPTIONS
VAPOR RETARDER ASS
CL
CLIMATE ZONE
aa
CLASS I CLASS II CLASS III
bc
5 PermittedPermittedPermitted
a. Vapor retarders with vapor permeance greater than 1 perm when measured by ASTM E96 water method (Procedure B) shall be
allowed on the interior side of any frame wall.
b. Use of a Class I interior vapor retarder in frame walls with a Class I vapor retarder on the exterior side shall require an approved
design.
c. Where a Class II vapor retarder is used in combination with foam plastic insulating sheathing installed as continuous insulation on
the exterior side of frame walls, the continuous insulation shall comply with Table R702.7(4) and the Class II vapor retarder shall
have a vapor permeance greater than 1 perm when measured by ASTM E96 water method (Procedure B).
The following section is hereby added to read as follows:
19
Section R703.11.3 Vinyl siding and soffits on new buildings. Vinyl siding and soffits on new buildings shall be
installed over onehour fire-rated assemblies listed for exterior fire exposure, in both the vertical and horizontal plane.
The following section is hereby added to read as follows:
Section R703.13.2 Insulated vinyl siding and soffits on new buildings. Insulated vinyl siding and soffits on new
buildings shall be installed over one-hour fire-rated assemblies listed for exterior fire exposure, in both the vertical
and horizontal plane.
The following section is hereby added to read as follows:
Section R703.14.4 Polypropylene siding on new buildings. Polypropylene siding on new buildings shall be
installed over one-hour fire-rated assemblies listed for exterior fire exposure, in both the vertical and horizontal plane.
CHAPTER 9 ROOF ASSEMBLIES
The following section is hereby amended to read as follows:
R902.1 Roofing covering materials. Except as otherwise allowed, roofs shall be covered with materials listed as
Class A and with materials as set forth in Sections R904 and R905. Class A, B or C roofing required to be listed by
this section shall be tested in accordance with ASTM E108 or UL 790. Roof assemblies with coverings of brick,
masonry, slate, clay or concrete roof tile, exposed concrete roof deck, ferrous or copper shingles or sheets, and
metal sheets and shingles, shall be considered Class A roof coverings. Exception: Any Class B or Class C roof
covering may be applied on any new construction that is added to an existing building, provided the roof extremities
of such existing building and new construction are located a minimum distance of 3 feet (1.524 m) from the nearest
adjacent property line and are a minimum distance of 6 feet (3.048 m) from another building.
The following section is hereby amended to read as follows:
R905.1.2 Ice barriers. An ice barrier shall be installed for asphalt shingles, metal roof shingles, mineral-surfaced roll
roofing, slate and slate-type shingles, wood shingles and wood shakes. The ice barrier shall consist of not fewer than
two layers of underlayment cemented together, or a self-adhering polymer-modified bitumen sheet shall be used in
place of normal underlayment and extend from the lowest edges of all roof surfaces to a point not less than 24
inches (610 mm) inside the exterior wall line of the building. On roofs with slope equal to or greater than 8 units
vertical in 12 units horizontal (67-percent slope), the ice barrier shall also be applied not less than 36 inches (914
mm) measured along the roof slope from the eave edge of the building.
Exceptions:
1. Detached accessory structures not containing conditioned floor area
2. Roof recover where the existing roof covering has not been removed.
The following section is hereby added to read as follows:
R905.2.4.2 Impact resistance of asphalt shingles. Asphalt shingles shall be Class 4 impact resistant, tested in
accordance with UL 2218, and installed in accordance with the manufacturer’s installation instructions. Exceptions
1. When an owner wishes to replace existing asphalt shingles that are less than class 4 impact resistant with tiles
of a similar color or style, and there are no class 4 impact resistance shingles available of similar color or style,
the building official may approve alternate materials that are less than class 4 impact resistant, so long as the
replacement shingles are the highest class of impact resistant shingles available that match the color or style of
the existing shingles. If no impact resistant materials are available, the building official may approve non-impact
resistant materials that meet all other applicable requirements of this Code.
2. For repairs or additions to existing asphalt singles that are less than class 4 impact resistant, the owner may use
the same or similar materials regardless of impact resistance of the new shingles.
The following section is hereby amended to read as follows:
R908.1 General. Materials and methods of application used for recovering or replacing an existing roof covering
shall comply with the requirements of Chapter 9 and Section R806 (“Roof Ventilation”). No portion of an existing
nonrated roof covering may be permanently replaced or covered with more than one square of nonrated roof
covering.
Exceptions:
1. Reroofing shall not be required to meet the minimum design slope requirement of one-fourth vertical in 12 units
horizontal (2percent slope) in Section R905 for roofs that provide positive roof drainage.
20
2. Any existing roof covering systemmay be replaced with a roof covering of the same materials and classification,
provided the roof covering has a minimum rating of Class B for buildings located in the Wildfire Hazard Area and
a minimum rating of Class C outside the Wildfire Hazard Area.
3. The reroofing of 50 percent or more during a one-year period of any existing structure requires Class A roof
covering materials.
CHAPTER 10 CHIMNEYS AND FIREPLACES
The following section is hereby added to read as
follows: Section R1001.1.1 Installation
A. All fireplaces installed in the Restricted Area (Figure R1001.1.1Town of Estes Park Fireplace Area Map) shall be
one of the following:
(i) A gas fireplace or fireplace with a gas log installed and functioning at time of final inspection.
(ii). An electric device; or
(iii). A fireplace that meets the most current emissions standards for wood stoves established by the Colorado
Air Quality Control Commission, or any other clean-burning device that is approved by the commission.
B. All fireplaces installed prior to January 1, 2002, in the Restricted Area shall be allowed to remain in use until
such time as the owner voluntarily replaces it. Upon replacement, such fireplace shall be one of the types
specified in Subsection (A) (i), (ii), or (iii).
C. Within the Non-restricted Area, fireplaces including but not limited to masonry and factory-built fireplaces shall
be allowed without being required to meet the standards in Subsection (A).
The following section is hereby amended by adding a new sentence to read as follows:
R1004.1 General. Factory-built fireplaces shall be listed and labeled and shall be installed in accordance with the
conditions of the listing. Factory-built fireplaces shall be tested in accordance with UL 127. Factory-built fireplaces
shall comply with Section R1001.1.1.
The following section is hereby amended to read as follows:
R1004.4 Unvented gas log heaters. An unvented gas log heater shall not be installed in a factory-built fireplace.
21
FIGURE R1001.1.1Townof Estes ParkFireplace Area Map
CHAPTER 11 ENERGY EFFICIENCY
The following section is hereby amended to read as follows:
N1101.1 (R101.2) Scope. This chapter regulates the energy efficiency for the design and construction of buildings
regulated by this code.
Exceptions: The following buildings and portions thereof are exempted from the provisions of this chapter:
1.Detached accessory utility or agricultural buildings which are neither heated nor cooled by fuel or electrical
energy.
2.Detached accessory utility or agricultural buildings heated or cooled in their interior for short periods of time
and switched with a timer of two hours or less.
0
3.Detached accessory utility or agricultural buildings not heated above 50F.
4.Detached accessory utility or agricultural buildings, and thermally isolated attached accessory utility and
agricultural areas, so long as they meet or exceed the following criteria: a) They do not contain habitable
space.
b)Any heating or cooling equipment installed therein is sized assuming a maximum Indoor Winter Design
oo
Dry–bulb Temperature of 60F and a minimum Indoor Summer Design Dry–bulb Temperature of 80F.
c)Thermal envelope walls are insulated to a minimum of R-15.
d)The roof/ceiling is insulated to a minimum of R-30.
e)Windows and glazing in doors have a maximum U-factor of 0.40 and in total do not exceed 10% of the
floor area.
f)Doors with minimum R-3 value are sealed to prevent infiltration to the extent practical as determined by
the building official.
g)Any plumbing installed therein is protected from freezing by an approved method.
22
The following section is hereby amended to read as follows:
N1101.3 (R101.5.1) Compliance materials. The code official shall be permitted to approve specific computer
software, worksheets, compliance manuals and other similar materials that meet the intent of this chapter. A
REScheck compliance certification verifying the home meets or exceeds 2018 or 2021 International Energy
Conservation Code requirements shall be deemed to satisfy the requirements of this code.
The following section is hereby amended by amending Exception #1.2 and adding Exception #3 to read as
follows:
N1102.1 (R402.1) General (Prescriptive). The building thermal envelope shall comply with the requirements of
Sections N1102.1.1 through N1102.1.5.
Exceptions:
1. The following low-energy buildings, or portions thereof, separated from the remainder of the building by building
thermal envelope assemblies complying with this section shall be exempt from the building thermal envelope
provisions of Section N1102.
222
1.1. Those with a peak design rate of energy usage less than 3.4 Btu/h • ft (10.7 W/m) or 1.0 watt/ftof floor
area for spaceconditioning purposes.
1.2. Those that do not contain conditioned or habitable space.
2. Log homes designed in accordance with ICC 400.
3. Greenhouses.
The following section is hereby amended to read as follows:
a
TABLE N1102.1.2 (R402.1.2) MAXIMUM ASSEMBLY U-FACTORS AND FENESTRATION REQUIREMENTS
CLIMATE FENESTRATION SKYLIGHT GLAZED CEILING WOOD MASS FLOOR BASEMENT CRAWL
f
U-
ZONE U-FACTOR U- FENESTRATION FRAME WALL U- WALL SPACE
b
FACTOR
FACTOR SHGC d, e WALL UFACTOR FACTOR UFACTOR WALL
c
UFACTOR UFACTOR
5 .32 0.55 .40 0.024 0.0450.082 0.0330.050 0.055
a. Nonfenestration U-factors shall be obtained from measurement, calculation, or an approved source.
b. Mass walls shall be in accordance with Section N1102.2.5. Where more than half the insulation is on the interior, the mass
wall U-factors shall not exceed 0.065.
c. Class 1 vapor retarders shall not be installed on the interior of framed walls where exterior ci value is less than R-7.5. d. The
SHGC column applies to all glazed fenestration.
The following section is hereby amended to read as follows:
TABLE N1102.1.3 (R402.1.3) INSULATION MINIMUM R-VALUES AND FENESTRATION REQUIREMENTS BY
a
COMPONENT
b c, f, g dc, f, g
Fenestration SkylightU-Glazed Ceiling Wood Frame Mass Wall Floor Basement Slab Crawl Space
b, i h
U-Factor Factor Fenestra RValue Wall R-ValueRValue Wall R-Value
R-Value
Wall
fg
-tion R-Value,
& Depth
R-Value
b,e
SHGC
.32 .55 .40 R-60 30 or 23+3 or 13/17 30 19 or 13+5 10ci, 19 or
e
20+5 or 13+10 or 0+15 30 in.13+5 or
or 0+15 0+15
For SI: 1 foot = 304.8 mm. ci = continuous insulation
a. R-values are minimums. U-factors and SHGC are maximums. Where insulation is installed in a cavity that is less than the label
or design thickness of the insulation, the installed R-value of the insulation shall be not less than the R-value specified in the table.
b. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration.
Exception: In Climate Zones 0 through 3, skylights shall be permitted to be excluded from glazed fenestration SHGC requirements
provided that the SHGC for such skylights does not exceed 0.30.
c. “5ci or 13” means R-5 continuous insulation (ci) on the interior or exterior surface of the wall or R-13 cavity insulation on the
interior side of the wall. “10ci or 13” means R-10 continuous insulation (ci) on the interior or exterior surface of the wall or R-13
cavity insulation on the interior side of the wall.
“15ci or 19 or 13 + 5ci” means R-15 continuous insulation (ci) on the interior or exterior surface of the wall; or R-19 cavity insulation
on the interior side of the wall; or R-13 cavity insulation on the interior of the wall in addition to R-5 continuous insulation on the
interior or exterior surface of the wall. d. R-5 insulation shall be provided under the full slab area of a heated slab in addition to the
23
required slab-edge insulation R-value for slabs. as indicated in the table. The slab edge insulation for heated slabs shall not be
required to extend below the slab. e. 30” (762 mm) or top of footings or bottom of monolithic slab, whichever is greatest.
f. Class 1 vapor retarders shall not be installed on the interior of framed walls where exterior ci value is less than R-7.5
g. The first value is cavity insulation; the second value is continuous insulation. Therefore, as an example, “13 + 5” means R-13
cavity insulation plus R-5 continuous insulation.
h.Mass walls shall be in accordance with Section N1102.2.5. The second R-value applies where more than half of the insulation
is on the interior of the mass wall.
The following section is hereby amended to read as follows:
N1102.2.4 (R402.2.4) Access hatches and doors. Access hatches and doors from conditioned to unconditioned
spaces such as attics and crawl spaces shall be insulated to the same R-value required by Table N1102.1.3 for the
wall or ceiling in which they are installed.
Exception: Vertical attic entries providing access from conditioned spaces to unconditioned spaces not required to
be a swinging door shall be less than or equal to U-0.10 or have an average insulation R-value of R-10 or greater. If
foam plastic insulation is used it shall comply with section R316.5.3. The reduction shall not apply to the total UA
alternative in Section N1102.1.5.
The following section is hereby amended to read as follows:
N1102.2.10.1 (R402.2.10.1) Crawl space wall insulation installations. Where crawl space wall insulation is
installed, it shall be permanently fastened to the interior or exterior wall and shall extend downward from the top of
the foundation wall to the footing. Exposed earth in unvented crawl space foundations shall be covered with a
continuous Class I vapor retarder in accordance with this code. Joints of the vapor retarder shall overlap by 6 inches
(153 mm) and be sealed or taped. The edges of the vapor retarder shall extend not less than 6 inches (153 mm) up
the stem walls and shall be attached to the stem walls and footings pads.
The following section is hereby amended to read as follows:
N1102.2.12 (R402.2.12) Sunroom and heated garage insulation.
Sunrooms enclosing conditioned space and heated garages shall meet the insulation requirements of this code.
Exception: For sunrooms and heated garages provided thermal isolation, and enclosing conditioned space, the
following exceptions to the insulation requirements of this code shall apply: 1.The minimum ceiling insulation R-
values shall be R-24.
2.The minimum wall insulation R-value shall be R-13. Walls separating a sunroom or heated garage with thermal
isolation from conditioned space shall comply with the building thermal envelope requirements of this code.
3. Slab-on-grade insulation shall not be required.
The following section is hereby added to read as follows:
N1102.2.13 (R402.2.13) Rim insulation requirements. All rims and adjoining plates shall require complete air
sealing and full encapsulation of insulation to a minimum R-Value of R-15 for spray foam or foam board, R-19 for
fiberglass or a hybrid of foam board and fiberglass. Plates and rims which are part of the thermal envelope shall be
insulated and shall have an air barrier on the conditioned side of the assembly.
The following section is hereby amended to read as follows:
N1102.4.1.1 (R 402.4.1.1) Building envelope performance verification. The components of the building thermal
envelope as indicated in Table R402.4.1.1 shall be installed in accordance with the manufacturer’s instructions and
the criteria indicated in Table R402.4.1.1, as applicable to the method of construction. The installation of the
continuous air barrier shall be verified by the code official and an approved air leakage testing agency in accordance
with the following:
1. A review of the construction documents and other supporting data shall be conducted to assess compliance with
the requirements in this section.
2. Inspection of continuous air barrier components and assemblies shall be conducted during construction while
the air barrier is still accessible for inspection and repair to verify compliance with the requirements of this
section and Table N1102.4.1.1.
3. An air barrier and air sealing inspection report shall be provided for inspections completed by the approved air
leakage testing agency. The air barrier and air sealing inspection report shall be provided to the building owner
or owner's authorized agent and the code official at the time of the framing or insulation inspection. The report
shall identify deficiencies found during the review of the construction documents and inspection and details of
corrective measures taken.
24
The following section is hereby amended by adding Exceptions #2 and #3 to read as follows:
N1102.4.1.2 (R402.4.1.2) Testing. The building or dwelling unit shall be tested for air leakage. The maximum air
leakage rate for any building or dwelling unit under any compliance path shall not exceed 5.0 air changes per hour or
32
0.28 cubic feet per minute (CFM) per square foot \[0.0079 m/(s × m)\] of dwelling unit enclosure area. Testing shall
be conducted in accordance with ANSI/RESNET/ICC 380, ASTM E779 or ASTM E1827 and reported at a pressure
of 0.2-inch w.g. (50 Pascals). Testing shall be conducted by an approved third party. A written report of the results of
the test shall be signed by the party conducting the test and provided to the code official. Testing shall be performed
at any time after creation of all penetrations of the building thermal envelope have been sealed. Exceptions:
1. For heated, attached private garages and heated, detached private garages accessory to one- and two-family
dwellings andTownhouses not more than three stories above grade plane in height, building envelope tightness
and insulation installation shall be considered acceptable where the items in Table N1102.4.1.1, applicable to
the method of construction, are field verified. An approved third party independent from the installer shall inspect
both air barrier and insulation installation criteria. Heated, attached private garage space and heated, detached
private garage space shall be thermally isolated from all other conditioned spaces in accordance with Sections
N1102.2.12 and N1102.3.5, as applicable.
2. Cabins without a primary heat source are not required to be tested for air leakage.
3. Existing building additions, alterations or change of use to residential are not required to be tested for air
leakage.
\[The remainder of the section is unchanged.\]
The following section is hereby amended to read as follows:
N1102.4.1.3 (R402.4.1.3) Leakage rate. Where complying with Section N1101.13.1, the building or dwelling unit
shall have an air leakage rate not exceeding 3.0 air changes per hour when tested in accordance with Section
N1102.4.1.2.
The following section is hereby amended to read as follows:
N1102.4.4 (R402.4.4) Rooms containing fuel-burning appliances. In new construction, where open combustion
air ducts providing combustion air to open combustion fuel-burning appliances are installed, the appliances and
combustion air openings shall be located outside the building thermal envelope or enclosed in a room that is isolated
from inside the thermal envelope. Such rooms shall be sealed and insulated in accordance with the envelope
requirements of Table N1102.1.3, where the walls, floors and ceilings shall meet a minimum of the basement wall R-
value requirement. The door into the room shall be fully gasketed and any water lines and ducts in the room
insulated in accordance with Section N1103. The combustion air duct shall be insulated where it passes through
conditioned space to an R-value of not less than R-8.
Exceptions:
1. Direct vent appliances with both intake and exhaust pipes installed continuous to the outside.
2. Fireplaces and stoves complying with Sections N1102.4.2 and Section R1006.
3. Rooms containing combustion air ducts not exceeding 4” (102 mm) in diameter.
The following section is hereby amended to read as follows:
N1103.7 (R403.7) Equipment sizing and efficiency rating. Heating and cooling equipment shall be sized in
accordance with ACCA Manual S based on building loads calculated in accordance with ACCA Manual J or other
approved heating and cooling calculation methodologies, such that the total sensible capacity of the cooling
equipment does not exceed the total sensible load by more than 25% for cooling-only applications, or by more than
All ducted combination heating and
40% for heating applications, using the Manual J Design Criteria in Table 301.2.
cooling systems shall be sized using cooling loads. New or replacement heating and cooling equipment shall have
an efficiency rating equal to or greater than the minimum required by federal law for the geographic location where
the equipment is installed.
The following section is hereby amended to read as follows:
N1111.1.1 (R503.1.1) Building envelope. Building envelope assemblies that are part of the alteration shall comply
with Section N1102.1.2 or N1102.1.4, Sections N1102.2.1 through N1102.2.12, N1102.3.1, N1102.3.2, N1102.4.3
and N1102.4.5.
Exception: The following alterations shall not be required to comply with the requirements for new construction
provided that the energy use of the building is not increased:
1.Storm windows installed over existing fenestration.
25
2.Existing ceiling, wall or floor cavities exposed during construction provided that these cavities are filled with
insulation. If the cavities are not filled, they shall be filled with insulation to the maximum extent practically possible in
the judgment of the building official, without requiring additional framing or installation of exterior insulation.
3.Construction where the existing roof, wall or floor cavity is not exposed.
4.Roof recover.
5.Roofs without insulation in the cavity and where the sheathing or insulation is exposed during reroofing shall be
insulated either above or below the sheathing.
6.Surface-applied window film installed on existing single-pane fenestration assemblies to reduce solar heat gain
provided that the code does not require the glazing or fenestration assembly to be replaced.
CHAPTER 13 GENERAL MECHANICAL SYSTEM REQUIREMENTS
The following section is hereby amended to read as follows:
M1307.3 Elevation of ignition source. Appliances having an ignition source shall be elevated such that the source
of ignition is not less than 18 inches (457 mm) above the floor in garages, barns, and similar utility spaces. For the
purpose of this section, rooms or spaces that are not part of the living space of a dwelling unit and that communicate
with a private garage through openings shall be considered to be part of the garage.
Exception: Elevation of the ignition source is not required for appliances that are listed as flammable-vapor-ignition
resistant.
CHAPTER 14 HEATING AND COOLING EQUIPMENT
The following section is hereby amended to read as follows:
M1401.3 Equipment and appliance sizing. Heating and cooling equipment and appliances shall be sized in
accordance with ACCA Manual S or other approved sizing methodologies based on building loads calculated in
accordance with ACCA Manual J or other approved heating and cooling calculation methodologies, such that the
total sensible capacity of the cooling equipment does not exceed the total sensible load by more than 25% for
cooling-only applications, or by more than 40% for heating applications, using the Manual J Design Criteria in Table
301.2. All ducted combination heating and cooling systems shall be sized using cooling loads. New or replacement
heating and cooling equipment shall have an efficiency rating equal to or greater than the minimum required by
federal law for the geographic location where the equipment is installed.
Exception: Heating and cooling equipment and appliance sizing shall not be limited to the capacities determined in
accordance with ACCA Manual S where either of the following conditions applies:
1.The specified equipment or appliance utilizes multistage technology or variable refrigerant flow technology and the
loads calculated in accordance with the approved heating and cooling calculation methodology are within the range
of the manufacturer’s published capacities for that equipment or appliance.
2.The specified equipment or appliance manufacturer’s published capacities cannot satisfy both the total and
sensible heat gains calculated in accordance with the approved heating and cooling calculation methodology and the
next larger standard size unit is specified.
The following section is hereby added to read as follows:
M1401.3.2 Room loads. Room-by-room design heating and cooling loads shall be calculated.
The following section is hereby amended to read as follows:
M1414.1 General. Fireplace stoves shall be listed, labeled and installed in accordance with the terms of the listing.
Fireplace stoves shall be tested in accordance with UL 737. Wood-burning appliances shall meet the latest emission
standards as established by the State of Colorado and Federal Regulation 40 CFR Part 60, Subpart AAA.
CHAPTER 15 EXHAUST SYSTEMS
The following section is hereby added to read as follows:
M1501.2 Indoor depressurization. Ducted exhaust systems shall not induce or create a negative pressure
sufficient to cause backdrafting of naturally vented, open combustion-chamber, fuel-burning appliances, or create
negative pressure in excess of negative 3 Pa. in the immediate proximity of combustion chambers of such
appliances.
26
The following section is hereby amended to read as follows:
Section M1502.4.2 Duct installation. Exhaust ducts shall be supported at intervals not to exceed 12 feet (3658
mm) and shall be secured in place. The insert end of the duct shall extend into the adjoining duct or fitting in the
direction of airflow. Exhaust duct joints shall be sealed in accordance with Section M1601.4.1 and shall be
mechanically fastened. Ducts shall not be joined with screws or similar fasteners. Where dryer exhaust ducts are
enclosed in wall or ceiling cavities, such cavities shall allow the installation of the duct without deformation.
The following section is hereby amended to read as follows:
M1502.4.6 Duct length. The maximum allowable exhaust duct length shall be determined by one of the methods
specified in Sections M1502.4.6.1 or M1502.4.6.2.
M1502.4.6.1 Specified length. The maximum length of the exhaust duct shall be 35 feet (10,668 mm) from the
connection to the transition duct from the dryer to the outlet terminal. Where fittings are used, the maximum length of
the exhaust duct shall be reduced in accordance with Table M1502.4.6.1. The maximum length of the exhaust duct
does not include the transition duct.
M1502.4.6.2 Dryer exhaust duct power ventilator. The maximum length of the exhaust duct shall be determined in
accordance with the manufacturer’s instructions for the dryer exhaust duct power ventilator.
The following section is hereby amended to read as follows:
M1503.1 General. Domestic cooking exhaust equipment shall comply with the requirements of this section. In new
construction, kitchens with gas-fired cooking appliances shall be supplied with an exhaust system vented to the
exterior. Ducts serving kitchen exhaust systems shall not terminate in an attic, crawl space or areas inside the
building, and shall not induce or create a negative pressure in excess of negative 3 Pa or adversely affect gravity-
vented appliances.
The following section is hereby amended to read as follows:
M1503.6 Makeup air required. Where one or more gas, liquid or solid fuel-burning appliances that are neither direct-
vent nor use a mechanical draft venting system are located within a dwelling unit’s air barrier, each exhaust system
3
capable of exhausting in excess of 600 cubic feet per minute (0.19 m/s) shall be mechanically or passively provided
with makeup air at a rate approximately equal to the exhaust air rate. Such makeup air systems shall be equipped with
not fewer than one damper complying with Section M1503.6.2. Exception: Makeup air is not required for exhaust
systems installed for the exclusive purpose of space cooling and intended to be operated only when windows or other
air inlets are open.
CHAPTER 16 DUCT SYSTEMS
Below Table M1601.1, this supplemental information is added to read as follows:
Thickness (inches) .013 .016 .018 .019 .023 .024 .027 .034
Galvanized Steel (gauge) 32 30 28 28 25 25 24 21
Aluminum (gauge) 28 26 25 24 23 22 21 19
The following section is hereby amended by deleting item #7 and renumbering item #8 as item #7 to read as
follows \[numbers 1 through 6 are unchanged\]:
M1601.1.1 Above-ground duct systems. Above-ground duct systems shall conform to the following:
7. Volume dampers, equipment, and other means of supply, return and exhaust air adjustment used in system
balancing shall be provided with access.
The following section is hereby added to read as follows:
M1601.4.11 Construction debris and contamination. Mechanical air-handling systems and their related ducts
shall be protected from the entrance of dirt, debris, and dust during the construction and installation process. Prior to
passing final inspection or issuance of a Certificate of Occupancy, such systems shall be substantially free of
construction-related contaminants.
The following section is hereby amended by adding one sentence at the beginning to read as follows (Items
#1 through #7 are unchanged):
M1602.2 Return air openings. A return air path shall be provided in all habitable rooms by means of ducts or
transfer grills. Return air openings for heating, ventilation and air-conditioning systems shall comply with all of the
following:
27
CHAPTER 24 FUEL GAS
The following section is hereby amended to read as follows:
G2404.11 (307.6) Condensate pumps. Condensate pumps located in uninhabitable spaces, such as attics and
crawl spaces, shall be connected to the appliance or equipment served such that, when the pump fails, an audible
alarm shall sound in the habitable area. Pumps shall be installed in accordance with the manufacturer’s instructions.
The following section is hereby amended by deleting exceptions 3 and 4 and renumbering exception 5 and 6
as follows: G2406.2 (303.3) Prohibited locations. Appliances shall not be located in sleeping rooms, bathrooms,
toilet rooms, storage closets or surgical rooms, or in a space that opens only into such rooms or spaces, except
where the installation complies with one of the following:
1.The appliance is a direct-vent appliance installed in accordance with the conditions of the listing and the
manufacturer’s instructions. 2. Vented room heaters, wall furnaces, vented decorative appliances, vented gas
fireplaces, vented gas fireplace heaters and decorative appliances for installation in vented solid fuel-burning
fireplaces are installed in rooms that meet the required volume criteria of Section G2407.5.
3. The appliance is installed in a room or space that opens only into a bedroom or bathroom, and such room
or space is used for no other purpose and is provided with a solid weather-stripped door equipped with an approved
self-closing device. Combustion air shall be taken directly from the outdoors in accordance with Section G2407.6.
4. A clothes dryer is installed in a residential bathroom or toilet room having a permanent opening with an area
2
of not less than 100 square inches (0.06 m) that communicates with a space outside of a sleeping room, bathroom,
toilet room or storage closet.
The following section is hereby amended to read as follows:
G2415.12 (404.12) Minimum burial depth. Underground piping systems shall be installed a minimum depth of 18
inches (457 mm) below grade, except as provided for in Section G2415.12.1.
The following section is hereby amended to read as follows:
G2415.12.1 (404.12.1) Individual outdoor appliances. Individual lines to outside lights, grills or other appliances
shall be installed not less than 18 inches (457 mm) below finished grade.
Exception: Approved materials installed a minimum of 6 inches (152 mm) below finished grade when covered with a
concrete slab 4 inches (102 mm) in minimum thickness.
The following section is hereby amended to read as follows:
G2417.4.1 (406.4.1) Test pressure. The test pressure to be used shall be 10 psi for non-welded pipe for natural gas,
30 psi for liquid propane gas.
Exception: One-piece tubing without joints other than at regulators is not required to be tested during inspection.
The last sentence in the following section is hereby amended to read as follows:
G2420.5.1 (409.5.1) Located within same room. The shutoff valve shall be located in the same room as the
appliance. The shutoff valve shall be within 6 feet (1829 mm) of the appliance, and shall be installed upstream of the
union, connector or quick disconnect device it serves. Such shutoff valves shall be provided with access. Shutoff
valves serving movable appliances, such as cooking appliances and clothes dryers, shall be considered to be
provided with access where installed behind such appliances. Appliance shutoff valves located in the firebox of a
fireplace shall be installed in accordance with the appliance manufacturer’s instructions and shall have a secondary
shutoff outside the firebox.
The following section is hereby amended to read as follows:
G2421.3 (410.3) Venting of regulators. Pressure regulators that require a vent shall be vented directly to the
outdoors. The vent shall terminate at least 3 feet from any openings into the building. The vent shall be designed to
prevent the entry of insects, water and foreign objects.
Exception: A vent to the outdoors is not required for regulators equipped with and labeled for utilization with an
approved vent-limiting device installed in accordance with the manufacturer’s instructions.
28
The following section is hereby amended by amending items #1 and #2 and deleting item 7 to read as
follows:
G2425.8 (501.8) Appliances not required to be vented. The following appliances shall not be required to be
vented:
1. Electric ranges.
2. Electric built-in domestic cooking units listed and marked for optional venting.
3. Hot plates and laundry stoves.
4. Type 1 clothes dryers (Type 1 clothes dryers shall be exhausted in accordance with the requirements of Section
G2439).
5. Refrigerators.
6. Counter appliances.
The following section is hereby amended to read as follows:
G2427.4.1 (503.4.1) Plastic piping. Where plastic piping is used to vent an appliance, the appliance shall be listed
for use with such venting materials and the appliance manufacturer’s installation instructions shall identify the
specific plastic piping material. The plastic pipe venting materials shall be labeled in accordance with the product
standards specified by the appliance manufacturer or shall be listed in accordance with UL 1738. Where installed as
an exhaust vent for a gas-fired water heater, the new plastic pipe shall be tested with 5 psi maximum air pressure by
the installer prior to being connected to the water heater.
The following section is amended to read as follows:
G2427.8 (503.8) Venting system terminal clearances. The clearances for through-the-wall direct-vent and
nondirect-vent terminals shall be in accordance with Figure G2427.8 and Table G2427.8. Vents shall terminate 12”
(305 mm) minimum above anticipated snow level and a minimum of 22 inches (559 mm) above the surface or grade
directly below.
Exception: The clearances in Table G2427.8 shall not apply to the combustion air intake of a direct-vent appliance.
The following section is hereby amended to read as follows:
G2439.7.2 (614.8.2) Duct installation. Exhaust ducts shall be supported at 4-foot (1219 mm) intervals and secured
in place. The insert end of the duct shall extend into the adjoining duct or fitting in the direction of airflow. Ducts shall
not be joined with screws or similar fasteners. Where dryer exhaust ducts are enclosed in wall or ceiling cavities,
such cavities shall allow the installation of the duct without deformation.
The following section is hereby amended to read as follows:
G2439.7.4 (614.9.4) Duct length. The maximum allowable exhaust duct length shall be determined by one of the
methods specified in Sections G2439.7.4.1 through G2439.7.4.2.
G2439.7.4.1 (614.9.4.1) Specified length. The maximum length of the exhaust duct shall be 35 feet (10,668 mm)
from the connection to the transition duct from the dryer to the outlet terminal. Where fittings are used, the maximum
length of the exhaust duct shall be reduced in accordance with Table G2439.7.4.1.
G2439.7.4.2 (614.9.4.3) Dryer exhaust duct power ventilator length. The maximum length of the exhaust duct
shall be determined by the dryer exhaust duct power ventilator manufacturer’s installation instructions.
The following section is hereby deleted in its entirety:
G2445 (621) UNVENTED ROOM HEATERS.
The following section is hereby added to read as follows:
G2447.6 Kitchens with gas cooking appliances. In new construction, kitchens with gas-fired cooking appliances
shall be supplied with an exhaust system vented to the outside in accordance with section M1503.
CHAPTER 25 PLUMBING ADMINISTRATION
The following section is hereby amended to read as follows:
29
P2503.5.1 Rough plumbing. DWV systems shall be tested on completion of the rough piping installation by water,
by air, or by a vacuum of air for plastic piping systems, without evidence of leakage. The test shall be applied to the
drainage system in its entirety or in sections after rough-in piping has been installed, as follows:
1. Water test. Each section shall be filled with water to a point not less than 10 feet (3048 mm) above the highest
fitting connection in that section, or to the highest point in the completed system. Water shall be held in the
section under test for a period of 15 minutes.
The system shall prove leak free by visual inspection.
2. Air test. The portion under test shall be maintained at a gauge pressure of 5 pounds per square inch (psi) (34
kPa) or 10 inches of mercury column (34 kPa). This pressure shall be held without introduction of additional air
for a period of 15 minutes.
3. Vacuum test. The portion under test shall be evacuated of air by a vacuum-type pump to achieve a uniform
gauge pressure of -5 pounds per square inch or a negative 10 inches of mercury column (-34 kPa). This
pressure shall be held without the removal of additional air for a period of 15 minutes.
The following section is hereby deleted in its entirety as
follows: P2503.6 Shower liner test.
CHAPTER 26 GENERAL PLUMBING REQUIREMENTS
The following section is hereby amended to read as follows:
P2602.1 General. The water-distribution system of any building or premises where plumbing fixtures are installed
shall be connected to a public water supply. Where a public water-supply system is not available, or connection to
the supply is not feasible, an individual water supply shall be provided. Individual water supplies shall be constructed
and installed in accordance with the applicable state and local laws.
Sanitary drainage piping from plumbing fixtures in buildings and sanitary drainage piping systems from premises
shall be connected to a public sewer. Where a public sewer is not available, the sanitary drainage piping and
systems shall be connected to a private sewage disposal system in compliance with state or local requirements.
Exception:Sanitary drainage piping and systems that convey only the discharge from bathtubs, showers, lavatories,
clothes washers and laundry trays shall comply with all applicable regulations.
The following section is hereby amended to read as follows:
P2603.5 Freezing. A water, soil or waste pipe shall not be installed outside of a building, in exterior walls, in attics
or crawl spaces, or in any other place subjected to freezing temperature unless adequate provision is made to
protect it from freezing by insulation or heat or both. Water service pipe shall be installed not less than 54 inches
below finished grade.
The following section is hereby amended to read as follows:
P2603.5.1 Sewer Depth. Building sewers that connect to private sewage disposal systems shall be not less than
12” below finished grade and shall comply with all applicable regulations.
CHAPTER 27 PLUMBING FIXTURES
The following section is hereby added to read as follows:
P2708.4.1. Shower head location. Shower heads shall be so located on the sidewall of shower compartments or be
arranged so the shower head does not discharge directly at the entrance to the compartment and the bather can
adjust the valve prior to stepping into the shower spray.
The following section is hereby amended to read as follows:
P2717.2 Sink and dishwasher. The combined discharge from a dishwasher and a one- or two-compartment sink,
with or without a food-waste disposer, shall be served by a trap of not less than 1½ inches (38 mm) in outside
diameter. The dishwasher discharge pipe or tubing shall rise to the underside of the counter and be fastened or
otherwise held in that position before connecting to the head of the food-waste disposer or to a wye fitting in the sink
tailpiece. Dishwashers may drain into a separately trapped standpipe provided with an air break as shown in Figure
P2717.
30
FIGURE P2717
CHAPTER 29 WATER SUPPLY AND DISTRIBUTION
The following section is hereby amended to read as follows:
P2901.2 Identification of nonpotable water systems. Where nonpotable water systems are installed, the piping
conveying the nonpotable water shall be identified either by color marking, metal tags or tape in accordance with
Sections P2901.2.1 through
P2901.2.2.3. Non-potable water systems shall comply with all applicable regulations.
The following section is hereby amended to read as follows:
P2903.4 Thermal expansion control. A means for controlling increased pressure caused by thermal expansion
shall be installed where required in accordance with Sections P2903.4.1 and P2903.4.2. Thermal expansion tanks
shall be installed and supported in accordance with the manufacturer’s instructions. Thermal expansion tanks shall
not be supported by the piping that connects to such tanks.
The following section is hereby amended to read as follows:
P2904.1 General. The design and installation of residential fire sprinkler systems shall be in accordance with NFPA
13D or Section P2904, which shall be considered to be equivalent to NFPA 13D. Partial residential sprinkler systems
shall be permitted to be installed only in buildings not required to be equipped with a residential sprinkler system.
Section P2904 shall apply to multipurpose wet-pipe sprinkler systems that do not include the use of antifreeze. A
multipurpose fire sprinkler system shall provide domestic water to both fire sprinklers and plumbing fixtures. A
backflow preventer shall not be required to separate a sprinkler system from the water distribution system.
Section P2910.1 Scope. The provisions of this section shall govern the materials, design, construction, and
installation of systems for the collection, storage, treatment, and distribution of nonpotable water. The use and
application of nonpotable water shall comply with all applicable regulations.
The following section is hereby amended to read as follows:
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P2911.1 General. The provisions of this section shall govern the construction, installation, alteration, and repair of
on-site nonpotable water reuse systems for the collection, storage, treatment, and distribution of on-site sources of
nonpotable water as permitted by the jurisdiction. Non-potable water systems shall comply withall applicable
regulations.
The following section is hereby amended to read as follows:
P2912.1 General. The provisions of this section shall govern the construction, installation, alteration and repair of
rainwater collection and conveyance systems for the collection, storage, treatment and distribution of rainwater for
nonpotable applications. The use and application of nonpotable water shall comply with all applicable regulations.
The following section is hereby amended to read as follows:
P2913.1 General. The provisions of this section shall govern the construction, installation, alteration, and repair of
systems supplying nonpotable reclaimed water. Non-potable reclaimed water systems shall comply with Larimer
County Department of Health and Environment regulations.
CHAPTER 30 SANITARY DRAINAGE
The following section is hereby amended by deleting the exception in its entirety to read as follows:
P3003.9.2 Solvent cementing. Joint surfaces shall be clean and free from moisture. A purple primer, or other
approved primer, that conforms to ASTM F656 shall be applied. Solvent cement not purple in color and conforming
to ASTM D2564, CSA B137.3 or CSA B181.2 shall be applied to all joint surfaces. The joint shall be made while the
cement is wet and shall be in accordance with ASTM D2855. Solvent-cement joints shall be installed above or below
ground.
The following section is hereby amended to read as follows:
P3005.2.3 Building drain and building sewer junction. The junction of the building drain and the building sewer
shall be served by a cleanout that is located at the junction or within 10 feet (3048 mm) developed length of piping
upstream of the junction. For the requirements of this section, removal of a water closet shall not be required to
provide cleanout access. When the cleanout is installed at the junction of the building drain and building sewer, it
shall be an approved two-way fitting with a single riser not to exceed 4 feet in depth or a two-riser cleanout using
back-to-back combination fittings of schedule 40 material.
The following section is hereby amended to read as follows:
P3009.1 Scope. The provisions of this section shall govern the materials, design, construction and installation of
subsurface graywater soil absorption systems connected to nonpotable water from on-site water reuse systems.
Subsurface graywater soil absorption systems connected to nonpotable water from on-site water reuse systems shall
comply with Larimer County Department of Health and Environment all applicable regulations.
CHAPTERS 34 -43 DELETED
Chapters 34 through 43 are hereby deleted in their entirety.
APPENDICES
Appendix AE “Manufactured Housing used as Dwellings” is hereby adopted as amended.
The following section is hereby amended to read as follows:
AE102.6 Relocation. Where manufactured homes are to be located at or above 6,000 feet (1829 m) elevation, or in
areas where ultimate design wind speeds equal or exceed 140 mph (225 km/h), the permit holder shall install or take
snow and wind mitigation measures pre-approved by theTown of Estes Park Building Division. Such measures may
include independent, engineered structural roof systems capable or resisting the site design snow load, approved
snow removal plans, engineered wind fences, or other engineered site-specific designs considering prevailing winds,
exposure, topography, trees and other relevant natural features.
The following sections are hereby deleted in their entirety:
SECTION AE105 APPLICATION FOR PERMIT
SECTION AE106 PERMITS ISSUANCE
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SECTION AE107 FEES
SECTION AE108 INSPECTIONS
SECTION AE109 SPECIAL INSPECTIONS
SECTION AE110 UTILITY SERVICE
Appendix AF “Radon Control Methods” is hereby adopted as amended.
The following section is hereby amended to read as follows:
AF101.1 General. This appendix contains requirements for new radon-resistant construction for all new dwellings
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and additions exceeding 1,000 sq. ft. (92.9 m) in floor area constructed under this code
The following section is hereby amended to read as follows:
AF103.1 General. The following construction techniques are intended to resist radon entry and prepare the building
for postconstruction radon mitigation (see Figure AF103.1).
The following section is hereby amended to read as follows:
AF103.2 Subfloor preparation. A layer of gas-permeable material shall be placed under all concrete slabs and
other floor systems that directly contact the ground and are within the walls of the living spaces of the building, to
facilitate installation of a sub-slab depressurization system. Each radon reduction vent pipe riser shall serve no more
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than 4000 square feet (371.6 m) of uninterrupted under slab/floor area. The gas-permeable layer shall consist of
one of the following:
1. A uniform layer of clean aggregate, not less than 4 inches (102 mm) thick. The aggregate shall consist of
material that will pass through a 2-inch (51 mm) sieve and be retained by a 1/4-inch (6.4 mm) sieve.
2. A uniform layer of sand (native or fill), not less than 4 inches (102 mm) thick, overlain by a layer or strips of
geotextile drainage matting designed to allow the lateral flow of soil gases.
3. Other materials, systems or floor designs with demonstrated capability to permit depressurization across the
entire subfloor area.
The following section is hereby amended to read as follows:
AF103.5 Passive submembrane depressurization system.In buildings with crawl space foundations, the following
components of a passive submembrane depressurization system shall be installed during construction.
The following section is hereby deleted:
AF103.5.1 Ventilation.
The following section is hereby amended to read as follows:
AF103.5.1 Soil-gas-retarder. The soil in crawl spaces shall be covered with a continuous layer of minimum 6-mil
(0.15 mm) polyethylene or 3 mil (0.076 mm) cross laminated polyethylene soil gas retarder. The ground cover shall
be lapped not less than 12 inches (305 mm) at joints and sealed or taped. The edges of the ground cover shall
extend a minimum of 12 inches (305 mm) up onto all foundation walls enclosing the under-floor space and be sealed
to the wall and any footing pads. An interior perimeter drain tile loop shall be connected to a plumbing tee or other
approved connection as per AF103.5.3.
The following section is hereby amended to read as follows:
AF103.5.2 Vent pipe. A plumbing tee or other approved connection shall be inserted horizontally beneath the
sheeting and connected to a 3- or 4-inch-diameter (76 or 102 mm) fitting with a vertical vent pipe installed through
the sheeting. The vent pipe shall be extended up through the building floors and terminate not less than 12 inches
(305 mm) above the roof in a location not less than 10 feet (3048 mm) away from any window or other opening into
the conditioned spaces of the building that is less than 2 feet (610 mm) below the exhaust point, and 10 feet (3048
mm) from any window or other opening in adjoining or adjacent buildings.
The following section is hereby added to read as follows:
AF103.13 Provisions for future depressurization fan installation. Permanent provisions shall be made for the
future installation of an in-line fan to be connected to every radon vent pipe. Such designated fan locations shall be
outside of the conditioned envelope of the building, such as in the attic, garage, and similar locations, excluding
crawl spaces and other interior under-floor spaces. Designated locations shall accommodate an unobstructed
permanent cylindrical space with the following minimum dimensions: 12 inches (305 mm) measured radially around
the radon vent pipe along a vertical distance of 30 inches (760 mm). Designated fan locations shall be permanently
accessible for servicing and maintenance. An electrical receptacle outlet shall be provided within 4 feet (1,219 m) of
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and within sight from designated fan locations and installed so as to not be covered by insulation. A light fixture shall
be installed in the area of future fan location.
The following section is hereby amended by amending item #10 and deleting #11 to read as follows:
AF104.1 Testing. Radon testing shall be as specified in Items 1 through 10:
1. Testing shall be performed after the dwelling passes its air tightness test.
2. Testing shall be performed after the radon control system and HVAC installations are complete. The HVAC
system shall be operating during the test. Where the radon system has an installed fan, the dwelling shall be
tested with the radon fan operating. 3. Testing shall be performed at the lowest occupied floor level, whether or
not that space is finished. Spaces that are physically separated and served by different HVAC systems shall
be tested separately.
4. Testing shall not be performed in a closet, hallway, stairway, laundry room, furnace room, bathroom or kitchen.
5. Testing shall be performed with a commercially available radon test kit or testing shall be performed by an
approved third party with a continuous radon monitor. Testing with test kits shall include two tests, and the test
results shall be averaged. Testing shall be in accordance with this section and the testing laboratory kit
manufacturer’s instructions.
6. Testing shall be performed with the windows closed. Testing shall be performed with the exterior doors closed,
except when being used for entrance or exit. Windows and doors shall be closed for not fewer than 12 hours
prior to the testing.
7. Testing shall be performed by the builder, a registered design professional or an approved third party.
8. Testing shall be conducted over a period of not less than 48 hours or not less than the period specified by the
testing device manufacturer, whichever is longer.
9. Written radon test results shall be provided by the test lab or testing party. The final written test report with
results less than 4 picocuries per liter (pCi/L) shall be provided to the code official.
10. Where the radon test result is 4 pCi/L or greater, the fan for the radon vent pipe shall be installed as specified in
Sections AF103.12 and AF103.13.
Exception: Testing is not required where the occupied space is located above an unenclosed open space.
Appendix AH “Patio Covers” is hereby adopted as amended:
The following section is hereby amended to read as follows:
AH105.2 Footings. In mobile home parks for patio covers supported independently of the home using approved post
bases on a slab-on-grade without footings, the slab shall conform to the provisions of Section R506, shall be not less
than 3.5 inches (89 mm) thick and the columns shall not support live and dead loads in excess of 750 pounds (3.34
kN) per column.
Appendix AJ “Existing Buildings and Structures” is hereby adopted as amended.
The following section is hereby amended to read as follows:
AJ102.4.3 Replacement windows for emergency escape and rescue openings. Where windows are required to
provide emergency escape and rescue openings, replacement windows shall be exempt from Sections R310.2 and
R310.4 provided that the replacement window meets the following conditions:
1. The replacement window is the manufacturer’s largest standard size window that will fit within the existing frame
or existing rough opening. The building official may allow the replacement window to be of the same operating
style as the existing window so long as it provides for an equal or greater window opening area, or require
upgrading to a window style that maximizes the opening area within the existing window frame.
2. Where the replacement window is not part of a change of occupancy.
Window opening control devices and fall prevention devices complying with ASTM F2090 shall be permitted for use
on windows serving as required emergency escape and rescue openings.
The following section is hereby added to read as follows:
AJ 102.10 Moved buildings or structures. Building and structures moved into or within Townof Estes Parkshall
comply with the provisions of the codes in effect when the building was built, or the 1970 Uniform Building Code and
the 1977 Colorado Energy Conservation as amended and adopted by Town of Estes Park if the building was
constructed prior to January 1, 1972. In addition, moved buildings and structures shall meet the requirements of wind
loads, snow loads, flood hazard areas, wildfire hazard areas, and fireplace-restricted areas of their new location.
The following section is hereby added to read as follows:
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AJ 102.11 Moved manufactured or mobile homes.Where manufactured or mobile homes are to be located at or
above 6,000 feet (1829 m), or in areas where ultimate design wind speeds equal or exceed 140 mph (225 km/h), the
permit holder shall install or take snow and wind mitigation measures pre-approved by the Town of Estes Park
Building Division. Such measures may include independent, engineered structural roof systems capable or resisting
the site design snow load, approved snow removal plans, engineered wind fences, or other engineered site-specific
designs considering prevailing winds, exposure, topography, trees and other relevant natural features.
Appendix AM “Home Day Care –R3 Occupancy” is hereby adopted in its entirety.
Appendix AQ “Tiny Houses” is hereby adopted in its entirety.
Appendix AR “Light Straw-Clay Construction” is hereby adopted in its entirety.
Appendix AS “Strawbale Construction” is hereby adopted in its entirety.
Appendix AU “Cob Construction (Monolithic Adobe)” is hereby adopted in its entirety.
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EXHIBIT C
AMENDMENTS TO THE 2021 INTERNATIONAL RESIDENTIAL CODE
RELATING TO VACATION HOMES
Add the following exceptions to Section R101.2 Scope:
3.Vacation homes shall be permitted to be regulated in accordance with the International
Residential Code for one-and two-family dwellings, where the dwellings legally existed
prior to the effective date of this provision and where compliant with Section R332.
4.Large vacation homes shall be permitted to be regulated in accordance with the
International Residential Code for one-and two-family dwellings, where a 2017 vacation
home or large vacation home registration was applied for prior to April 01, 2017 and where
compliant with Section R332. The occupant load for large vacation homes regulated by the
International Residential Code shall be determined based on the number of bedrooms
approved in conjunction with the 2017 registration application received prior to April 01,
2017.
5.Vacation homes constructed under permits applied for on or after June 26, 2017 shall be
permitted to be regulated in accordance with the International Residential Code for one-
and two-family dwellings, where new large vacation homes are prohibited by land use
regulations and where compliant with Section R332.
6.Vacation homes constructed under permits applied for on or after June 26, 2017 shall be
permitted to be regulated in accordance with the International Residential Code for one-
and two-family dwellings; where new large vacation homes are allowed; where they have
less than 2200 square feet of enclosed floor area, excluding attached garages, an occupant
load of less than nine and do not have more than three bedrooms; and where compliant
with Section R332.
7.Vacation homes constructed under permits applied for on or after June 26, 2017 shall be
permitted to be regulated in accordance with the International Residential Code for one-
and two-family dwellings, where constructed under a Development Plan approved prior to
the effective date of this provision and no floor area or additional rooms used for sleeping
purposes are added beyond the approved Development plan and where compliant with
Section R332.
Add the following definitions to Section R202 Definitions:
Accessory Dwelling Unit (ADU). A dwelling unit, either attached or detached, which is on the
same lot and under the same ownership as the primary dwelling. When accessory dwelling units
and primary dwelling units are attached, they shall be regulated as two attached single-family
dwellings.
Approved Development Plan. Approved Development Plans are those projects which have been
formally submitted, reviewed and approved pursuant to the residential and accommodations
provisions of Table 3-3 of the Estes Park Development Code.
Hotel. A building or a portion of a building which contains dwelling units and/or sleeping units
where accommodations are provided for nine or more occupants transient in nature and where
units may be individually rented.
Large Vacation Home. A one-family dwelling constructed in compliance with the scoping
provisions of the International Residential Code, where accommodations are provided for a single
group of nine or more occupants transient in nature and where rooms may not be individually
rented to guests which are not part of the group.
Large Vacation Home Occupant Load. For the purposes of using a dwelling as a large vacation
home, the approved maximum number of occupants shall be determined by allowing 2 occupants
per approved bedroom plus 2 additional occupants. In large vacation homes, all occupants shall
sleep only in rooms designated and approved for sleeping purposes. Large vacation homes
1
regulated by the International Building Code shall comply with minimum design occupant load
requirements of the International Building Code.
Small Hotel. A building or a portion of a building which contains dwelling units and/or sleeping
units where accommodations are provided for less than nine occupants, transient in nature and
where units may be individually rented.
Transient. Occupancy of a dwelling unit or sleeping unit for not more than 30 days.
Vacation Home. A one-family dwelling constructed in compliance with the scoping provisions of
the International Residential Code, where accommodations are provided for a single group of less
than nine occupants transient in nature and where rooms may not be individually rented to guests
which are not part of the group.
Vacation Home Occupant Load. For the purposes of using a dwelling as a vacation home, the
approved maximum number of occupants shall be determined by allowing 2 occupants per
approved bedroom plus 2 additional occupants. In vacation homes, all occupants shall sleep only
in rooms designated and approved for sleeping purposes.
Add Section R332 as follows:
SECTION R332
VACATION HOME AND LARGE VACATION HOME
LIFE SAFETY INSPECTION
R332.1 Life safety inspection. Vacation homes and large vacation homes shall comply with
section R332. A vacation home or a large vacation home shall not be approved for occupancy
unless the vacation home owner has made a full and complete application for a life safety
inspection building permit to convert the home to a vacation home or large vacation home, the
Chief Building Official or designee performs a life safety inspection, and the home has obtained
the applicable Certificate of Occupancy in accordance with section R332.3. At minimum, vacation
home and large vacation home life safety inspections shall include the provisions of R332.2.1
through R332.2.20.
R332.2.1 Address identification. Vacation homes and large vacation homes shall have approved
address identification, in compliance with the code in effect at the time of the initial inspection.
R332.2.2 Unapproved uses. Uses of all rooms/spaces shall comply with approved uses per
Building Division records. Change of use permits, inspections and approvals shall be required
for all rooms with uses different from Building Division records.
R332.2.3 Unpermitted work. All unpermitted work shall be permitted, compliant and approved.
R332.2.4 Unapproved work. All unapproved work authorized by permits which have expired
shall be re-permitted, compliant and approved.
R332.2.5 Structural concerns. Obvious structural concerns shall be mitigated.
R332.2.6 Emergency escape and rescue openings. Compliant emergency escape and rescue
openings shall be provided for all spaces used for sleeping purposes. For dwellings constructed
after December 31, 1968, said openings shall comply with the code in effect at the time the
opening was required. For dwellings constructed prior to January 01, 1969, the minimum
requirements for said openings shall be at the discretion of the Building Official until determined
by amendment based on documentation of existing conditions.
R332.2.7 Window wells. Where required, compliant window wells shall be properly installed at
emergency escape and rescue openings. For dwellings constructed after December 31, 1968, said
window wells shall comply with the code in effect at the time the well was required. For dwellings
constructed prior to January 01, 1969, the minimum requirements for said window wells shall be
at the discretion of the Building Official until determined by amendment based on documentation
of existing conditions.
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R332.2.8 Smoke alarms. Approved smoke alarms shall be properly installed at all locations in
compliance with the code in effect at the time of the initial inspection.
R332.2.9 Carbon monoxide alarms. Approved carbon monoxide alarms shall be properly
installed at all locations in compliance with the code in effect at the time of the initial inspection.
R332.2.10 Fuel gas appliances.
a. Fuel gas appliances shall be in approved locations.
b. Fuel gas appliances shall be in dedicated spaces, where applicable.
c. Fuel gas appliances shall comply with required clearances.
d. Fuel gas appliances shall be provided with required combustion air.
e. Fuel gas appliances shall be connected to approved venting systems.
f. Fuel gas appliances shall have required temperature and pressure relief valves.
g. Fuel gas appliances shall have proper condensate disposal.
h. Rooms/spaces containing fuel gas appliances shall be properly fire-blocked.
i. Other than existing cook tops, no ventless fuel gas appliances are allowed in Estes
Park.
R332.2.11 Dwelling/garage separation. Dwellings shall be separated from garages with materials
on the garage side in compliance with the code in effect at the time of the initial inspection.
R332.2.12 Environmental duct terminations. Dryer ducts and exhaust fans shall terminate at
approved locations.
R332.2.13 Handrails. Approved handrails shall be properly installed at locations in compliance
with the code in effect at the time of the initial inspection.
R332.2.14 Guards. Approved guards shall be properly installed at locations in compliance with
the code in effect at the time of the initial inspection.
R332.2.15 Cook stove. Anti-tip devices shall be installed for all cook stoves.
R332.2.16 Wildfire hazard. Wildfire defensible spaces shall be maintained as required for new
construction, as it relates to vegetation, not to building construction.
R332.2.17 Fire pits. Exterior fire pits shall comply with Fire Department requirements. Solid
fuel burning appliances are further regulated under section 5.20.110 of the Municipal Code.
R332.2.18 Lighting at exterior stairs. Lighting at exterior stairs shall be properly installed in
compliance with the code in effect at the time of the initial inspection.
R332.2.19 Ground-Fault Circuit-Interrupter Protection. Ground-fault circuit-interrupter
protection for personnel shall be provided in locations in compliance with the code in effect at
the time of the initial inspection.
R332.2.20 Private Septic Systems. Dwellings with private septic systems require approval from
the Larimer County Health Department prior to the addition of any bedroom.
R332.3 Certificate of Occupancy. After a life safety inspection has been performed and no
violations of the inspection are existing, the Building Official shall issue a Certificate of
Occupancy for use as a vacation home or a large vacation home. In addition to other requirements
for Certificates of Occupancy in this code, Certificates of Occupancy for vacation homes and
large vacation homes shall specify the number of rooms approved for sleeping purposes and the
maximum approved occupant load for use as a vacation home or largevacation home.
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