The Louisville Colorado roofing codes follow new guidelines for 2018 ICC/IBC, and the wind speed rating is 115 mph with 3 second gusts. Hail damage roof inspectors stay up to date on all the roofing code changes in Louisville and the Colorado Front Range area.

Information Updated On

1/2/19

Building Department Phone

303-335-4584

Permits

Fax

303-335-4588

Department Website

Informational Handout

Current Building Code

2018 ICC/IBC

Current Energy Code

2012

Requires a Building Permit

Yes

Roof System/Fire Rating required for Residential Dwellings

Class A

Roof System/Fire Rating required for Commercial Buildings

Class A

Roof System/Fire Rating required for Multi-Family

Class A

Minimum sustained wind speed rating for Asphalt Shingles

115 mph 3 second gust

Requires wind nailing

Yes, 6 nail pattern

Inspectors carry ladders for the final

No

Requires midroof (in progress) inspection

Yes

Maximum number of layers of asphalt shingles permitted

2 layers

Maximum number of layers of flat roof material permitted

2 layers

Require a sheathing/decking inspection

No

Requires solid sheeting (plywood/OSB) over spaced decking

Yes

Minimum gap size for sheeting

Per manufacturer requrements

Requires drip edge

Yes

Drip edge size minimum

1×2

Requires Rake/Gable metal edging

Yes

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

Yes

Underlayment required for 4:12 and above

15# – must remove all existing layers of underlayment

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

4 inches

Requires positive drainage

Yes

Permits Soffit eave/vents

No

Allows 90 lb rolled roofing on low slope heating living space

Yes

Low Slope

2:12