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Arapahoe County Roofing Codes
These are the Arapahoe County Colorado roofing codes. There is a minimum sustained wind rating for asphalt shingles installed on any property in Arapahoe County.
Information Updated On
8/22/18
Building Department Phone
720.874.6600
Inspection Line
720.874.6600
Fax
303.874.6611
Current Building Code
2015 IBC/IRC
Current Energy Code
2009 IECC
Requires a Building Permit
Yes
Minimum sustained wind speed rating for Asphalt Shingles
90 MPH sustained/ 110 MPH 3 second gusts
ASTM Standard for wind rating
D 7158
Inspectors carry ladders for the final
No, a ladder/ladders must be provided by homeowner or contractor and secured in place for all levels to be inspected.
Requires midroof (in progress) inspection
Mid-roof inspection required for any batten type roofing application (tile, coated metal, etc) prior to concealment of battens.
Maximum number of layers of asphalt shingles permitted
2 layers, although it’s recommended that all layers be removed prior to laying new material.
Maximum number of layers of flat roof material permitted
2 layers, although it’s recommended that all layers be removed prior to laying new material.
Require a sheathing/decking inspection
Yes, is decking is replaced
Requires solid sheeting (plywood/OSB) over spaced decking
Yes
Requires drip edge
Yes
Drip edge size minimum
Must cover openings
Requires Rake/Gable metal edging
No
Enforces the use of Self Adhering Underlayment (i.e., Ice & Water)
No
Type of valleys allowed
Both
Kick-out required on Step Flashing
Yes
Requires ridge cap
Yes
Requires ventilation to meet building codes
Yes
Allows 90 lb rolled roofing on low slope heating living space
No, only allowed in non-heated spaces




