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 1–2 | Class 4 (highest) |
| Typical lifespan in North Texas | 15–25 years | 20–30 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.
Is the extra cost worth it upfront?
Class 4 shingles add a modest premium to the material cost compared to a standard architectural shingle. See our roof replacement cost guide for what a full DFW roof runs by material. Over time, part of that 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.
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.