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Windsor Colorado Roofing Codes

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Windsor Colorado Roofing Codes

Homeowners and roofing contractors can review the Windsor Colorado Roofing Codes for residential roof repair and roof replacement projects. Roofing contractors in Windsor also use the roofing codes for commercial roofing.

Information Updated On


Building Department Phone


Inspection Line





Department Website

Informational Handout

Current Building Code

2012 IRC/IBC

Current Energy Code

2009 IECC

Requires a Building Permit


Roof System/Fire Rating required for Residential Dwellings

Class A

Special conditions

A,B or C depending on building construction classification

Minimum sustained wind speed rating for Asphalt Shingles

90 MPH 3 second gusts

ASTM Standard for wind rating

ASTM D 7158, ASTM 3161 Class A, D, F

Requires a manufacturer’s wind warranty

Per manufacturer

Requires wind nailing


Inspectors carry ladders for the final

Yes, with one story access

Requires midroof (in progress) inspection


Maximum number of layers of asphalt shingles permitted

One layer

Maximum number of layers of flat roof material permitted

One layer

Require a sheathing/decking inspection

Yes – exception: if decking has rotted and been replaced

Requires solid sheeting (plywood/OSB) over spaced decking


Maximum gap size for sheeting

¼ inch gap

Requires drip edge


Drip edge size minimum

1 x 2 – cover sheathing by ¼ inch

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 inch overlap of 15#

Underlayment required for 4:12 and above

15# – for asphalt: two layers on 2:12 – 4:12 non asphalt: varies per code

Type of valleys allowed


Valley Underlayment/Material required for closed valleys


Valley Underlayment/Material required for open valleys


Kick-out required on Step Flashing


Minimum curb height requirement


Chimney crickets requirement

30” or greater width

Requires positive drainage


Requires ventilation to meet building codes


Requires Soffit eave/vents


Allows 90 lb rolled roofing on low slope heating living space


Low Slope

2:12 – 1:12 allowed but with restrictions

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