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Roofing/ReRoofing Standards

The City of Thornton has amended the roofing sections of the International Building Code and the International Residential Code to require asphalt shingles to carry a manufacturers national wind warranty for the City’s designated wind speed of 90 mph 3-Second Gust. Please see our Roofing Standards for a list of approved shingles and other roofing requirements.

Roof Permit Application

City of Thornton
9500 Civic Center Drive, Thornton, CO 80229
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