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Denver Colorado Roofing Codes

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Denver Colorado Roofing Codes

These are the Denver Colorado roofing codes. There are special permits required for any new roof penetration such as a skylight, swamp cooler or solar panels. The class of roof is determined by the building’s construction type.

Information Updated On


Building Department Phone


Inspection Line



Department Website

Informational Handout

Current Building Code

2015 IBC/IRC & 2016 Denver Building Code Amendments

Current Energy Code

2015 IECC

Requires a Building Permit


Other/Special Permits required

All new roof penetrations require a permit (e.g., skylight, rooftop units,

pipes, solar, etc.).

Roof System/Fire Rating required for Commercial Buildings

Class A

Special conditions

Class of roofing depends on the building’s type of construction per the IBC/IRC

Minimum sustained wind speed rating for Asphalt Shingles

Areas east of Federal Blvd. – 115 mph min. rating

Federal Blvd. to Sheridan Blvd. – 125 mph min. rating

Sheridan Blvd. to Kipling St. – 140 mph min. rating

ASTM Standard for wind rating

D-3161 and D-7158

Requires wind nailing

Per manufacturers instructions

Inspectors carry ladders for the final

Yes, with one story access.

Requires midroof (in progress) inspection

Tile roof require mid-roof inspection at 30% complete. All other materials are only required if identified in a pre-inspection.

Maximum number of layers of asphalt shingles permitted

Two layers permissible, must tear off down to deck.

Maximum number of layers of flat roof material permitted

Two layers permissible, must tear off down to deck.

Require a sheathing/decking inspection


Requires drip edge


Drip edge size minimum

Minimum 2” overlap for segments, extend a minimum of 1/4” below roof sheathing and a minimum of 2” onto roof deck.

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 15 pound

Underlayment required for 4:12 and above

15 pound

Type of valleys allowed

Both, no closed valleys with metal liner.

Valley Underlayment/Material required for closed valleys

Closed valleys shall be a minimum of 36” wide of either 1) one ply of smooth roll roofing or 2) self-adhering modified bitumen. Metal is not allowed in a closed valley.

Valley Underlayment/Material required for open valleys

Open valleys lined with metal shall be a minimum of 24” wide and corrosion resistant. Open valleys lined with two plies of rolled roofing shall be permitted where the bottom layer is at least 18” wide and the top layer is at least 36” wide.

Kick-out required on Step Flashing


Minimum curb height requirement


Chimney crickets requirement

All vertical projections on sloped roofs greater than 30” require a cricket or saddle made of sheet metal or of the same material as the roof covering.

Requires ridge cap


Requires ventilation to meet building codes

Yes on new construction only

Requires Soffit eave/vents

Yes on new construction only

Special insulation code requirements

Per energy code

Allows 90 lb rolled roofing on low slope heating living space




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