What actually makes a shingle "Class 4"?
Class 4 is the top rating in a four-level scale that comes from a test called UL 2218. In that test, a steel ball is dropped onto the shingle from increasing heights to simulate hail impact. Shingles that survive the toughest drop without cracking earn a Class 4 rating, the highest impact resistance a shingle can carry. Standard three-tab and most base-model architectural shingles aren't rated at all, or land in Class 1 or 2, which is a big part of why they crack and lose granules so fast after a real North Texas hailstorm.
Does Texas really require insurers to offer a discount?
Yes, and this is one of the few states where it's not optional for the insurer. Texas was the first state to require it, and the rule still stands today: any property insurer selling homeowner policies in Texas has to offer a premium credit for roofs covered in impact-resistant material that passes the UL 2218 test. Each company decides its own discount percentage, so what your neighbor's insurer offers and what yours offers won't necessarily match. That's a state insurance rule, not a marketing promise from a shingle manufacturer or a roofing company.
How much can you actually save?
There's no single number that applies to every policy. In practice, homeowners who install Class 4 shingles and formally request the credit commonly report discounts somewhere in the 10 to 30 percent range on the dwelling portion of their premium. The dollar amount depends on your total premium, your home's value, and your specific insurer's discount schedule. It's worth calling your agent before you pick a shingle, not after, so you know exactly what your carrier offers.
| Standard architectural shingle | Class 4 impact-resistant shingle | |
|---|---|---|
| UL 2218 rating | None, or Class 1 to 2 | Class 4 (highest) |
| Typical lifespan in North Texas | 15 to 25 years | 20 to 30 years |
| Mandatory TX insurance discount | Not eligible | Eligible, insurer sets amount |
How do you actually get the discount applied?
The credit doesn't show up on your bill just because you installed the right shingle. You have to document it and ask.
- Choose a shingle that's genuinely UL 2218 Class 4 rated, not just marketed as "impact resistant" without the certification behind it.
- Get a signed installation certificate and an itemized invoice from your roofing contractor naming the exact product installed.
- Submit both documents to your insurance agent and ask them to apply the impact-resistant roofing credit to your policy.
- Confirm it on your next renewal statement, not just verbally, since the discount should show as a line item on your declarations page.
We supply the manufacturer paperwork and a detailed invoice on every roof replacement we complete, specifically so homeowners have what their insurer needs without having to chase it down later.
Which Class 4 shingles do we install?
Every major manufacturer now makes at least one UL 2218 Class 4 line. The differences between them come down to how the impact resistance is achieved: some use a heavier fiberglass mat with a rubberized backing, others use a polymer-modified asphalt that stays flexible in cold weather. Both approaches pass the same test. These are the lines we most often install in North Dallas.
| Manufacturer | Class 4 line | How it gets there |
|---|---|---|
| GAF | Timberline AS II | Rubberized asphalt layer over a reinforced mat |
| Owens Corning | Duration STORM | SBS-modified asphalt with the SureNail nailing strip |
| Malarkey | Legacy, Vista | Polymer-modified asphalt that stays flexible in cold |
| CertainTeed | Landmark IR | Reinforced backing on the standard Landmark profile |
| Atlas | StormMaster Shake | SBS-modified asphalt, shake-style profile |
One caution worth repeating: "impact resistant" on a brochure is not the same thing as a UL 2218 Class 4 certification, and only the certified product earns the Texas premium credit. Ask for the product name and the rating in writing on your bid. If your HOA has an architectural committee, check the color and profile with them before you order, since Class 4 lines don't always come in the full color range of the standard line.
What Class 4 shingles cost in North Dallas
Class 4 typically adds somewhere in the range of 10 to 25 percent to the shingle material cost compared with a standard architectural shingle. On a typical North Dallas roof that usually works out to roughly $1,000 to $3,000 more than the same roof in a standard shingle, though the real number depends on the size and complexity of your roof and on which product line you pick. For context on the full job, our roof replacement cost guide covers what a complete DFW roof runs by material. Treat those figures as a planning range, not a quote. We measure your roof and price the specific product before you commit to anything.
Is the extra cost worth it upfront?
That depends on how long you plan to stay and what your carrier's credit actually is, which is why the call to your agent comes first. Over time, part of the upfront difference gets offset by the insurance discount, and Class 4 products are generally built with a heavier fiberglass mat and modified asphalt, so they tend to hold their shape and granule coverage longer than a standard shingle exposed to the same North Texas hail seasons. If you're planning to sell inside a couple of years, the math is much tighter and we'll say so.
Do Class 4 shingles actually hold up in a real hailstorm?
Better than standard shingles, yes, though no shingle is truly hail-proof. The UL 2218 test simulates impact with a steel ball, and real hailstones vary in size, density, and the angle they hit at. A large enough hailstone can still dent a Class 4 roof, but it takes noticeably more to cause a crack or split than it does on an unrated shingle. That's why we still recommend a post-storm inspection even on a Class 4 roof. If you're filing a claim after a storm, our storm damage and insurance team documents exactly what changed and works the claim from there.
We install Class 4 shingles for homeowners across Garland and the wider DFW area, and we'll walk you through which manufacturers and product lines your specific insurer recognizes before you commit to one. If you're not sure whether your current roof already qualifies, that's an easy thing to check on a free inspection.