Class 4 impact-resistant shingles
Class 4 impact-resistant shingles in Fort Collins
If you're going to own a roof in the hail belt, own one that doesn't total every time a storm rolls off the foothills. Class 4 shingles cost a little more up front, earn a discount on most Colorado policies, and turn the average Fort Collins hailstorm into something you sweep off the deck instead of file a claim for.
What Class 4 actually means
The rating comes from UL 2218, a test in which a two-inch steel ball is dropped from 20 feet onto the shingle — twice in the same spot — and the shingle's back is checked for cracks. Pass and it's Class 4, the highest rating. A two-inch steel ball hits harder than most two-inch hail, which is about the largest Fort Collins sees in a typical summer.
Class 4 shingles get there one of two ways: a polymer-modified (SBS) asphalt that stays flexible and absorbs the hit, or a reinforced fiberglass mat that resists cracking. The SBS type — Malarkey Vista and Legacy, Owens Corning Duration Flex, CertainTeed NorthGate — also handles the freeze-thaw and UV of this elevation better than standard asphalt, which is why they last longer here even in years with no hail at all.
What the upgrade costs
Class 4 shingles Fort Collins roofers install run $40–$90 per square more than standard architectural. On a 28-square two-story that is $1,100–$2,500 on top of a $12,000–$22,000 replacement. Nothing else about the job changes — same tear-off, same underlayment, same ice-and-water shield, same permit — so the whole roof is still $10,000–$24,000 on most Fort Collins homes. The cost page shows the numbers by house size.
The insurance discount
Most insurers writing homeowners policies in Colorado offer a premium credit for a documented Class 4 roof. The size varies by carrier and by policy, but on the Front Range it is commonly in the range of 5 to 30 percent off the wind-and-hail portion of the premium, sometimes off the whole premium. On a $2,500 annual policy, that is a real number, and on most homes it pays back the upgrade within three to six years.
To get it you need the manufacturer's Class 4 certification for the specific shingle line and a completed installation form, which we supply, and your agent files it. Ask for the credit before you choose the shingle so you know the number.
The catch: cosmetic damage exclusions
Here's the fine print nobody mentions at the door. When some insurers grant the Class 4 discount, they add a cosmetic damage exclusion to the policy: hail that dents or marks the roof without affecting its function isn't covered. On a Class 4 roof that is a fair trade most of the time, because the shingle isn't going to fail from a surface mark. But it means you need to read the endorsement and understand that a hail-scuffed Class 4 roof that still sheds water is yours to live with, not a claim. We'll walk you through it; your agent has to sign off on it.
Where Class 4 makes the most sense
- Any roof paid for by an insurance claim. If you're replacing a hail-totaled roof anyway, the upgrade is small money and the next storm is the one you're protecting against. Some insurers will even pay the Class 4 upgrade cost on a claim; ask.
- Homes on the east side of town — Rigden Farm, Bucking Horse, Maple Hill, out toward Timnath and Windsor — where the cells that build over the foothills have grown to full size by the time they arrive.
- Anyone staying put five years or more. The discount and the avoided deductibles add up.
- HOAs that require it. Several newer subdivisions along the Harmony and Timberline corridors now write Class 4 into their covenants.
When it makes less sense
If you're selling in a year, the buyer gets the benefit and you pay for it — though a documented Class 4 roof is a line in the listing that Larimer County buyers understand. And if your insurer offers no credit, the case rests on avoided deductibles and longer life alone, which is still a decent case in this climate but not a slam dunk.
Metal as the other Class 4 option
Standing-seam steel is also Class 4 rated, and it doesn't bruise at all. It costs two to three times what shingles do and it will show cosmetic dents from very large hail, which is where that exclusion really bites. On a house you'll keep for 20 years, we'll quote it beside the shingle number so you can see both. See roof replacement for what's under either one, and our post on architectural versus 3-tab shingles for how the shingle tiers compare.
Other roofing services
Roof Repair
Leaks at boots, flashing and valleys, wind-lifted shingles, hail-cracked ridge caps, soft decking — found from the roof and attic, fixed with a written price.
Roof Repair →Roof Replacement
Tear-off to the deck, synthetic underlayment, ice-and-water shield, Class 4 or standard architectural shingles. One to two days, $9,500–$22,000 on most homes.
Roof Replacement →Hail Damage & Insurance Claims
Walked inspection, chalked test squares, a scope your adjuster can read, and a roof installed by a local company — with Colorado's deductible law followed to the letter.
Hail Damage & Insurance Claims →Roof Inspection
A walked inspection with photos and a written report — for buying a house, deciding whether to file a claim, or finding out how many years the roof has left.
Roof Inspection →Questions we get asked
How much do Class 4 shingles cost compared to regular shingles?
About $40–$90 per square more, so $1,100–$2,500 extra on a typical Fort Collins two-story. The rest of the roof — tear-off, underlayment, flashing, permit — costs the same either way. Most Colorado insurers discount the policy enough to pay that back within a few years.
Will Class 4 shingles survive any hail?
No shingle survives softball hail, and very large stones can still crack a Class 4 mat. What they do is turn the one-to-two-inch hail Fort Collins gets most summers into a non-event, where a standard shingle would be bruised and totaled. Over a 20-year life, that usually means zero claims instead of one or two.
Does the Class 4 discount come with a catch?
Sometimes. Some insurers pair the discount with a cosmetic damage exclusion, meaning dents that don't affect function aren't covered. On a Class 4 shingle roof that's a reasonable trade; on a metal roof it matters more. Read the endorsement before you accept it, and ask your agent to spell it out.
Need roof work in Fort Collins?
Call for a free estimate. Mon–Sat 7am–7pm.