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

Department Website

Informational Handout

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

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