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

Department Website

Informational Handout

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

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