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Commerce City Colorado Roofing Codes

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Commerce City Colorado Roofing Codes

Here is a listing of the Commerce City Colorado roofing codes. Note the current energy code is based on 2009 requirements.

Information Updated On


Building Department Phone


Inspection Line




Department Website

Current Building Code

2009 IBC/IRC

Current Energy Code

2009 IECC

Requires a Building Permit


Other/Special Permits required

A roofing/re-roofing permit is only for roof new covering installations and/or replacement of existing roof coverings. Sheathing/decking replacement is allowed with roofing or re-roofing permit provided it is included in the description of work. Any other work (e.g. structural modifications) requires a separate permit.

Roof System/Fire Rating required for Residential Dwellings

Class C

Special conditions

Class C allowed on one and two-family dwellings. Other roof covering classifications vary based on the type of construction as defined in the 2009 IBC

Minimum sustained wind speed rating for Asphalt Shingles

90 MPH or 3 second gust

Other wind speed rating

Exposure category C unless engineering analysis justifies different exposure category

Requires a manufacturer’s wind warranty


Requires wind nailing


Inspectors carry ladders for the final

Yes, but only with one story access. 

Requires midroof (in progress) inspection

Yes, required at 50% complete.

Maximum number of layers of asphalt shingles permitted

Two layers

Maximum number of layers of flat roof material permitted

Two layers

Require a sheathing/decking inspection


Requires solid sheeting (plywood/OSB) over spaced decking


Minimum gap size for sheeting

3/8” gap

Requires drip edge


Drip edge size minimum

1 x 2

Requires Rake/Gable metal edging


Enforces the use of Self Adhering Underlayment (i.e., Ice & Water)


Underlayment required 2:12 up to 4:12

19” overlap of 30 pound

Underlayment required for 4:12 and above

15 pound 

Type of valleys allowed

Open and closed

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


Minimum curb height requirement


Chimney crickets requirement


Requires ventilation to meet building codes

Yes, attic ventilation must be brought up to current code on tear offs to deck.

Requires Soffit eave/vents


Was delighted to have quality work done in a timely manner. Especially considering the demand in the construction industry right now where sometimes even getting a call back seems like an oddity. Will return for future roofing needs.
Dana Hubbard
Dana Hubbard
Pete was vert professional and easy to communicate. Made it easy for us and I recommend them to all future customers.
Jandos Yerkhanat
Jandos Yerkhanat
I am very satisfied with their work and their work ethic. Job was done in a timely fashion. Customer service was not lacking, every time I would call I would get an immediate response. They went beyond the usual for me and I would recommend them highly!! Thank you Peak to Peak Roofing!!
Grace Barbera
Grace Barbera
My realtor suggested Damen at Peak to Peak for a roof replacement through our insurance. We were on a timeline to sell our home, and Damen was an absolute rock star. He answered the call on a Sunday night, showed up for an inspection and helped us through the process - getting the entire job done within a couple short weeks. The roof looks amazing, and Damen also met with our insurance adjuster and added the gutters and garage door. I can't say enough about the professionalism, communication, availability and work that Damen and Peak to Peak provide. Give them a call - you won't regret it!
Chase Piker
Chase Piker
Peak to Peak Roofing did a great job on putting new nsulation in my attic. Never left a mess. Would recommend them to anyone who needs this type of work
Daryl Otwell
Daryl Otwell
They were very helpful in getting repair done in a timely manner. They also painted the house. Everything looks very good and well done.
Joan Costa
Joan Costa