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Longmont Colorado Roofing Codes

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Longmont Colorado Roofing Codes

Here are the Longmont Colorado roofing codes. Note there will be changes in the roofing codes at the end of 2018. A double layer of underlayment is required on roof replacements in Longmont.

Information Updated On


Building Department Phone


Inspection Line


Fax Line


Department Website

Current Building Code

2015 IBC

Intends to Update Code in the Future

Yes, late 2018

Current Energy Code

2015 IECC

Requires a Building Permit


Minimum sustained wind speed rating for Asphalt Shingles

110 MPH sustained wind/130 MPH 3 second gusts

ASTM Standard for wind rating

ASTM D3161 Class F, D7158 Class G & H

Requires a manufacturer’s wind warranty


Inspectors carry ladders for the final

Yes, with one story access

Requires midroof (in progress) inspection

Yes, for commercial before dry-in

Maximum number of layers of asphalt shingles permitted

Only 1 layer is permitted

Maximum number of layers of flat roof material permitted

Only 1 layer permitted

Requires solid sheeting (plywood/OSB) over spaced decking


Requires drip edge


Drip edge size minimum

2 x 3

Requires Rake/Gable metal edging


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


Underlayment required 2:12 up to 4:12

A double layer of underlayment required

Underlayment required for 4:12 and above

One layer of minimum Type 15 required

Type of valleys allowed


Valley Underlayment/Material required for closed valleys


Valley Underlayment/Material required for open valleys


Kick-out required on Step Flashing


Requires ventilation to meet building codes


Was delighted to have quality work done in a timely manner. Especially considering the demand in the construction industry right now where sometimes even getting a call back seems like an oddity. Will return for future roofing needs.
Dana Hubbard
Dana Hubbard
Pete was vert professional and easy to communicate. Made it easy for us and I recommend them to all future customers.
Jandos Yerkhanat
Jandos Yerkhanat
I am very satisfied with their work and their work ethic. Job was done in a timely fashion. Customer service was not lacking, every time I would call I would get an immediate response. They went beyond the usual for me and I would recommend them highly!! Thank you Peak to Peak Roofing!!
Grace Barbera
Grace Barbera
My realtor suggested Damen at Peak to Peak for a roof replacement through our insurance. We were on a timeline to sell our home, and Damen was an absolute rock star. He answered the call on a Sunday night, showed up for an inspection and helped us through the process - getting the entire job done within a couple short weeks. The roof looks amazing, and Damen also met with our insurance adjuster and added the gutters and garage door. I can't say enough about the professionalism, communication, availability and work that Damen and Peak to Peak provide. Give them a call - you won't regret it!
Chase Piker
Chase Piker
Peak to Peak Roofing did a great job on putting new nsulation in my attic. Never left a mess. Would recommend them to anyone who needs this type of work
Daryl Otwell
Daryl Otwell
They were very helpful in getting repair done in a timely manner. They also painted the house. Everything looks very good and well done.
Joan Costa
Joan Costa