Does Lafayette Require Class 4 Impact-Resistant Shingles?

Yes. If you are replacing or repairing a roof in the City of Lafayette, Colorado and the work covers one square (100 square feet) or more of shingles, the city requires Class 4 impact-resistant shingles. This has been the rule since the amendment took effect on March 15, 2021, and it is still in force today.

This guide breaks down exactly what the rule means for your home, your permit, and your wallet. Many homeowners in Lafayette do not find out about this requirement until a bid comes in wrong, so it pays to get ahead of it.

What the Lafayette amendment actually says

Lafayette follows the 2021 International Residential Code and the 2021 International Building Code, with one important local amendment layered on top. That amendment requires Class 4 impact-resistant shingles on residential roofing projects. To pass inspection, you have to show documentation or the actual packaging of the Class 4 shingles, posted on site with your yellow Inspection Record Card.

Here are the specifics worth knowing:

• The permit trigger is one square, which is 100 square feet of shingles. Cross that threshold and you need a permit, and the Class 4 requirement applies.
• Asphalt roofs are limited to two layers. If you already have two, the old roof has to come off.
• Drip edge and rake metal are required.
• Ice and water shield is required, and that includes the eaves and the valleys.
• Your shingles also have to meet a wind standard: ASTM D7158 Class G or H, or ASTM D3161 Class F.

None of this is optional. The city is clear that incomplete submittals will not be accepted, and an inspection that does not meet the requirements gets canceled with a re-inspection fee.

What is a Class 4 impact-resistant shingle?

Class 4 is the top rating on a test called UL 2218. In that test, a two-inch steel ball is dropped from twenty feet onto the same spot on the shingle, twice. To earn a Class 4 rating, the shingle cannot crack, split, or tear on either side. Class 1 through Class 3 shingles fail at smaller impacts. Class 4 is the highest level of impact resistance the industry offers.

Most Class 4 shingles installed in Colorado use SBS-modified asphalt. SBS is a rubberized polymer blended into the shingle that lets it flex and rebound on impact instead of cracking the way a standard shingle does. That flexibility is exactly what you want when hail comes through.

Why Lafayette put this rule in place

If you live in Lafayette, you already know the answer. This is hail country. Colorado sits in the middle of what insurers call the hail belt, and the Front Range averages dozens of damaging hail events every year. A standard architectural shingle takes a beating in a hailstorm. The granules fracture, the mat bruises, and the roof loses years of life even when it is not leaking yet. Lafayette adopted the Class 4 amendment so that every roof going on in the city is built to shrug off the everyday hail that shreds a standard roof.

There is a second layer to this. Lafayette sits right next to the grasslands that fueled the Marshall Fire, so wildfire resilience matters here too. Building a tougher, code-compliant roof is part of a bigger picture of protecting these homes against the two biggest threats on this side of the metro.

What this means for your roof project

Here is the practical side. When you reroof in Lafayette:

• Your contractor pulls the permit and must be licensed with the city.
• You install a UL 2218 Class 4 shingle, no exceptions.
• The packaging or documentation of those Class 4 shingles has to be posted on site for the inspector.
• Lafayette does one final inspection, not a mid-roof inspection, unless the job is commercial or the decking is being replaced.
• The roof pitch gets written on the inspection card, and the roof has to be clear, dry, and safe for the inspector

If a bid you receive prices out standard architectural shingles for a Lafayette home, something is wrong. Either the roof will not pass inspection, or whoever wrote the bid is not planning to pull a permit. Both are problems you do not want to inherit. Always confirm that your bid specifies Class 4, UL 2218 certified shingles before you sign anything.

The insurance upside most homeowners miss

This is the part many homeowners miss. A Class 4 roof is not just a code box to check. Most major carriers writing policies in Colorado offer a premium discount for a verified Class 4 roof, often somewhere in the range of 5 to 30 percent depending on the carrier and product. On a typical Colorado policy, that can add up to real money back every year for the life of the roof. In Lafayette, Class 4 is required anyway, so it makes sense to claim the discount that comes with it. Ask your contractor for the documentation, send it to your agent, and request that the impact-resistant endorsement be added to your policy.

How Excel Roofing handles Lafayette projects

We have been roofing Colorado homes since 1993, and we are an Owens Corning Platinum Preferred Contractor, a status held by only a small percentage of roofers nationwide. On Lafayette homes we install Class 4 products like the Owens Corning Duration Storm line, we pull the permit, we handle the documentation the city needs for inspection, and we give you the paperwork your insurance company wants for your discount. You never have to chase any of it down.

And because we do not think you should have to gamble on a roofer, everything we do is backed by our promise: You Don't Pay A Cent Until You're Content.

Frequently asked questions

Are Class 4 shingles required in all of Colorado?

No. There is no statewide mandate. A handful of jurisdictions require them, and Lafayette is one of them. Fort Collins, Loveland, and unincorporated Boulder County also require Class 4. Many other Front Range cities do not require them yet, though the trend across the state is moving in that direction.

When did Lafayette's Class 4 requirement take effect?

The amendment took effect on March 15, 2021, and it remains in effect today.

Does the requirement apply to small repairs?

The permit and the Class 4 requirement kick in at one square, which is 100 square feet of shingles. Work below that threshold does not trigger a permit.

Do I need to prove my shingles are Class 4?

Yes. Lafayette requires documentation or the packaging of the Class 4 shingles to be posted on site with the Inspection Record Card, or the inspection will not pass.

Will a Class 4 roof lower my insurance?

Very often, yes. Most Colorado carriers offer a premium discount for a verified Class 4 roof. The exact amount varies by carrier, so ask your agent and make sure you submit the documentation.

Can any roof survive Colorado hail?

No roof is hail-proof. A large enough stone will damage anything. What a Class 4 shingle does is handle the everyday hail that destroys standard shingles, which is exactly why Lafayette requires it.

Roofing in Lafayette? Let's get it done right.

If you are planning a roof replacement, or you just took a hit from a storm in Lafayette, we can walk your roof, confirm what your project needs to meet code, and handle the permit and inspection from start to finish. We're On Top Of It.