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Firestone Colorado Roofing Codes
These are the Firestone Colorado roofing codes. The current energy code is based on 2009 requirements. The manufacturer wind warranty must meet a 90 MPH minimum.
Information Updated On
8/22/18
Building Department Phone
303-833-3291
Fax Line
303-774-0455
Inspection Line
888-774-0454
Current Building Code
2012 IRC
Current Energy Code
2009 IECC
Requires a Building Permit
Yes
Roof System/Fire Rating required for Residential Dwellings
Class C
Roof System/Fire Rating required for Commercial Buildings
Class C
Roof System/Fire Rating required for Multi-Family
Class C
Minimum sustained wind speed rating for Asphalt Shingles
90 MPH sustained/110 MPH 3 second gusts
Requires a manufacturer’s wind warranty
Must meet manufacturer rating for 90 MPH
Requires wind nailing
Yes
Inspectors carry ladders for the final
No
Requires midroof (in progress) inspection
No
Maximum number of layers of asphalt shingles permitted
One overlay allowed
Maximum number of layers of flat roof material permitted
One overlay allowed
Require a sheathing/decking inspection
No
Requires solid sheeting (plywood/OSB) over spaced decking
Yes
Minimum gap size for sheeting
Any gap at all
Requires drip edge
Yes
Drip edge size minimum
1×2
Requires Rake/Gable metal edging
Yes
Enforces the use of Self Adhering Underlayment (i.e., Ice & Water)
No
Underlayment required 2:12 up to 4:12
Double underlayment required
Underlayment required for 4:12 and above
15 pound
Type of valleys allowed
Both
Valley Underlayment/Material required for closed valleys
90 pound
Valley Underlayment/Material required for open valleys
90 pound under metal
Kick-out required on Step Flashing
Yes
Minimum curb height requirement
No
Chimney crickets requirement
24” or greater width
Requires ridge cap
Yes
Requires ventilation to meet building codes
Yes
Requires blower door test when increasing ventilation to code
No
Requires Soffit eave/vents
No
Allows 90 lb rolled roofing on low slope heating living space
Yes
Slope
2:12