HomeMy WebLinkAboutCWRC Roofing Requirements108 Eighth Street, Suite 401
Glenwood Springs, Colorado 81601
(970) 945-8212
Roofing Requirements - Colorado Wildfire Resiliency Code
Reroof permits are required. New or remodeled structures, the roofing requirements are
included with the building permit for that structure.
Refer to the State Website to determine the Fire Intensity Classification. Click on the
map link on the State Website and find the property in question.
https://dfpc.colorado.gov/sections/wildfire-resiliency-code-board
There are basically 3 classifications, No Hazard, Low Hazard and Medium/High Hazard.
No Hazard has no Wildfire requirements. It is recommended but not required.
Low and Medium/High Hazard
403.2 Roofing. Roofs shall have a roof covering or roof assembly classified as Class A when
tested in accordance with ASTM E108 or UL 790.
403.2.1 Flame and ember protection of roofs. For roof assemblies where the roof
covering profile creates a space between the roof covering and roof deck, the space shall
resist the entry of flames and embers by one or more of the following methods:
1. Firestopping with noncombustible material of the space between the roof covering
and the roof deck. (Cold Roofs)
2. Installation of one layer of cap sheet complying with ASTM D3909 over the
combustible roof deck.
3. Installation of a listed Class A classified roof assembly, including underlayment.
403.2.2 Roof valley flashings. Valley flashings shall be not less than 0.019 inch (No. 26
galvanized sheet gage) corrosion-resistant metal installed over a minimum 36- inch-wide
underlayment consisting of one layer of cap sheet complying with ASTM D3909 running
the full length of the valley.
403.3 Gutters and downspouts. Gutters and downspouts shall be constructed of noncombustible material.
403.4 Ventilation Openings. Ventilation openings for enclosed attics, enclosed rafter spaces, and
underfloor spaces shall be in accordance with Section 403.4.1 or Section 403.4.2 as applicable.
403.4.1 Performance Requirements. See the code for these details
Intrusion Test.
403.4.2 Prescriptive Requirements. Ventilation openings for enclosed attics, enclosed
rafter spaces, and underfloor spaces shall be covered with noncombustible
404.3 Corrosion-resistant mesh with openings not to exceed ⅛-inch
Please provide the manufactures information and how the specific roofing material
including underlayment will create a Class A Fire Rating
Community Development Department