The roofing codes for Littleton Colorado are listed here. The code specifies a 2:12 slope minimum, and a building permit is required for new roof coverings and repairs of existing roofs that are over 100 square feet.

Information Updated On

9/9/18

Building Department Phone

303-795-3751

Inspection Line

303-795-3738

Permits

303-795-3738

Fax

303-795-3897

Department Website

Informational Handout

Current Building Code

2012 IBC/IRC

Current Energy Code

2012 IECC

Requires a Building Permit

Yes, for all new roof coverings and repairs of existing roofs over 100 square feet.

ASTM Standard for wind rating

D 225, D 3462, D 3161, or D 7158

Inspectors carry ladders for the final

Yes, with one story access

Requires midroof (in progress) inspection

Yes, inspection required once all roof covering has been removed and new underlayment has been installed.

Maximum number of layers of asphalt shingles permitted

One layer

Maximum number of layers of flat roof material permitted

One layer

Requires drip edge

Yes, at all eaves and gable ends of roofs.

Drip edge size minimum

Drip edge shall extend a minimum of ¼” below the sheathing and extend up the roof deck a minimum of 2” onto the decking.

Requires Rake/Gable metal edging

Yes

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

Yes

Distance inside warm wall

Ice barrier shall extend from the lowest edge of all roof surfaces to at least 24” inside of warm wall.

Underlayment required 2:12 up to 4:12

Double layer

Type of valleys allowed

Closed and Open

Valley Underlayment/Material required for open valleys

Minimum 24” wide 26-gage galvanized steel

Kick-out required on Step Flashing

Yes

Minimum curb height requirement

No

Requires ridge cap

Yes

Requires positive drainage

Yes

Requires ventilation to meet building codes

Yes

Slope

2:12 minimum