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Westminster Colorado Roofing Codes
Westminster Colorado Roofing Codes
Roofing contractors and hail damage roof inspectors can access the Westminster Colorado Roofing Codes for residential roof repair and roof replacement projects as well as commercial roof repair and replacement projects.
Information Updated On
1/6/2019
Building Department Phone
303-658-2075
Inspection Line
303-650-0626
Fax
303-706-3922
Please check Codes Locally as some codes may have changed since this page was last updated
Current Building Code
2015 IRC/IBC
Current Energy Code
2015 IECC
Requires a Building Permit
Yes
Other/Special Permits required
Decking permit
Roof System/Fire Rating required for Residential Dwellings
Class C
Minimum designed wind speed rating for Asphalt Shingles
100-120 MPH, location based
ASTM Standard for wind rating
ASTM D 7158 G or H
Requires a manufacturer’s wind warranty
Per manufacturer
Requires wind nailing
Yes, per manufacturer requirements
Inspectors carry ladders for the final
Yes, with one story access – contractor to provide if over one story
Requires midroof (in progress) inspection
Yes on non-asphalt and commercial builds at 50%
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, a decking inspection
Requires solid sheeting (plywood/OSB) over spaced decking
Yes
Maximum gap size for sheeting
¼ inch gap
Requires drip edge
Yes
Drip edge size minimum
Must extend ¼ inch below sheathing and 2 inches on roof
Requires Rake/Gable metal edging
Yes
Enforces the use of Self Adhering Underlayment (i.e., Ice & Water)
No
Underlayment required for 4:12 and above
15#
Type of valleys allowed
Both
Valley Underlayment/Material required for closed valleys
Either
Valley Underlayment/Material required for open valleys
Either
Kick-out required on Step Flashing
Yes
Minimum curb height requirement
No
Requires positive drainage
Yes
Requires ventilation to meet building codes
Yes, new construction only
Permits Soffit eave/vents
Yes
Allows 90 lb rolled roofing on low slope heating living space
Yes
Low Slope
1:12 per manufacture
