Arvada Colorado Roofing Codes

Here are the Arvada Colorado roofing codes. There is a requirement for wind nailing on roofs in Arvada, and there is a minimum sustained wind speed rating on asphalt shingles that differs for properties on the east vs. west side of Highway 93.

Information Updated On

9/1/18

Building Department Phone

720.898.7620

Inspection Line

720.898.7630

Department Website

Informational Handout

Current Building Code

2015 IBC

Requires a Building Permit

Yes

Other/Special Permits required

Complete re-decking requires a separate permit

Roof System/Fire Rating required for Residential Dwellings

Class C

Roof System/Fire Rating required for Commercial Buildings

Class A

Roof System/Fire Rating required for Multi-Family

Class A

Special conditions

Residential shakes are allowed and not a rated system

Minimum sustained wind speed rating for Asphalt Shingles

East of Highway 93 – 136 Vult

West of Highway 93 – 142 Vult

ASTM Standard for wind rating

3161 Class F

Requires a manufacturer’s wind warranty

No

Requires wind nailing

Yes, per manufactures specs, but no less than 4 nails per shingle.

Inspectors carry ladders for the final

Yes, for eave heights less than 12’

Requires midroof (in progress) inspection

For low slope, commercial roofs, and specialty roofs.

Maximum number of layers of asphalt shingles permitted

Two layers

Require a sheathing/decking inspection

Yes

Requires solid sheeting (plywood/OSB) over spaced decking

No

Minimum gap size for sheeting

½”

Requires drip edge

Yes

Drip edge size minimum

Required to cover open areas

Requires Rake/Gable metal edging

Yes

Requires Rake/Gable metal edging

Yes

Enforces the use of Self Adhering Underlayment (i.e., Ice & Water)

No, unless required by the manufacturer

Underlayment required 2:12 up to 4:12

Double underlayment required

Type of valleys allowed

Both

Valley Underlayment/Material required for closed valleys

Bottom layer 1-36” 90 lbs. shingles over top.

Valley Underlayment/Material required for open valleys

Asphalt open valley use 2 layers 90 lbs.

Kick-out required on Step Flashing

Yes

Minimum curb height requirement

Yes, 6 inches

Chimney crickets requirement

Crickets are required for all chimneys and saddles (ridge side) 30” or wider. Existing buildings that are working need not be upgraded.

Requires ridge cap

Yes

Requires ventilation to meet building codes

Yes, per code or per manufacturer

Requires blower door test when increasing ventilation to code

No

Requires Soffit eave/vents

No

Allows 90 lb rolled roofing on low slope heating living space

Allowed in non-heated space only. Not rated for wind but ok for unheated.

Slope

Per manufacturer specifications.

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