Impact resistant shingles are asphalt shingles built to take hail hits better than standard shingles, and Class 4 is the highest rating you can buy. If you live in Central Texas, where hail is a regular event, they are usually worth pricing out, especially if your insurance company offers a premium credit for them. Below you'll find what the ratings mean, how Class 3 compares with Class 4, what affects cost, how insurance discounts work, and the steps to take before you sign a contract.
TL;DR
- Impact resistant shingles are rated Class 1 through Class 4 under the UL 2218 test. Class 4 is the toughest and the one Texas regulators point to for debris-prone areas.
- Class 4 does not mean hailproof. The rating means the shingle did not crack through under a specific steel-ball test. Cosmetic dents and granule loss can still happen.
- Many Texas insurers have offered premium discounts for Class 4 roofs since the late 1990s. The size of the credit varies by carrier, so get it in writing before you buy.
- The upgrade pays off fastest where hail strikes often and where you plan to stay in the home for years.
- Get at least two or three written estimates, and ask each one for the exact product name and its UL 2218 class.
Table of Contents
- What impact resistant shingles are
- How the impact rating is tested
- Class 3 vs Class 4 shingles
- Impact resistant shingles vs regular shingles
- Do Class 4 shingles lower your insurance premium?
- How much do impact resistant shingles cost?
- Are impact resistant shingles worth it?
- Our perspective
- Getting a Class 4 roof from us
- Your next steps
- FAQ
- Sources
What impact resistant shingles are
An impact resistant shingle is still an asphalt shingle. The difference is in how it's made. Manufacturers use modified asphalt, extra thickness or stronger reinforcement so the shingle absorbs a hit without the mat underneath cracking. IIBEC, a building-envelope professional body, describes these products and how they are tested.
You'll see the same thing called impact rated shingles, hail resistant shingles or Class 4 shingles. They all point to the same idea: a shingle that has passed a standardized impact test and carries a rating mark.
Why it matters in Central Texas
Hail does not need to be huge to hurt an asphalt roof. Once a hit fractures the mat or knocks off enough granules, the shingle sheds water less well and ages faster. A roof that looks fine from the driveway can already be leaking at the decking. That is why a rating built around fracture, not just looks, is useful.
How the impact rating is tested
The rating comes from UL 2218, the standard for impact resistance of roof coverings. UL Solutions confirms the standard yields four classes, 1 through 4.
The test is simple in concept. Steel balls of set sizes are dropped from set heights onto installed shingles. Two impacts land within half an inch of each other, including on weak spots. The sample passes only if no through-crack, tear or fracture shows under 5× magnification, according to IIBEC's write-up of the method. Dents and crushed granules may still be allowed.
Here are the test parameters IIBEC lists:
| Class | Steel ball | Drop height | Impact energy |
|---|---|---|---|
| Class 1 | 1.25 in | 12 ft | 3.53 ft·lbf |
| Class 2 | 1.5 in | 15 ft | 7.35 ft·lbf |
| Class 3 | 1.75 in | 17 ft | 13.56 ft·lbf |
| Class 4 | 2 in | 20 ft | 23.71 ft·lbf |
Notice that Class 4 carries nearly twice the energy of Class 3 in the lab. Energy matters more than ball size alone. The Insurance Institute for Business & Home Safety (IBHS) designs its own test around that idea, using heavier projectiles at lower speeds to match the energy of a natural hailstone.
What the label does not tell you
Researchers writing in Natural Hazards Review point out that a lab pass or fail simplifies real storms. Repeated hits, the spot on the roof, and whether damage affects water shedding all matter. Treat Class 4 as a strong head start, not a force field.
Class 3 vs Class 4 shingles
Class 4 is the better rating, and the gap is real but modest in everyday terms. Class 3 shingles are tested with a 1.75-inch steel ball dropped from 17 feet. Class 4 shingles take a 2-inch ball from 20 feet. GAF's comparison of the two classes gives the same numbers.
What that means for you:
- Class 3 gives a step up from a basic shingle. It's a reasonable middle option where hail is occasional and smaller.
- Class 4 is the top tier. It's the class most insurers tie premium credits to.
- Neither is a promise against damage. Large hail, wind-driven stones or a bad installation can still hurt either one.
Before you compare prices, ask whether a discount applies to Class 3 at all. Many carriers reward only Class 4, which can make the cheaper class a poor deal.
Impact resistant shingles vs regular shingles
Standard shingles have no impact rating. Some premium architectural lines carry one, and some do not. "Architectural" describes the shape and thickness of the shingle, not its toughness.
IBHS tested this directly. Its research found impact resistant architectural shingles beat basic architectural shingles in every UL 2218 class. Approximate pass rates for impact resistant versus basic architectural products were:
| UL 2218 class | Impact resistant architectural | Basic architectural |
|---|---|---|
| Class 1 | about 75% | about 55% |
| Class 2 | about 70% | about 40% |
| Class 3 | about 60% | about 35% |
| Class 4 | about 40% | about 30% |
Two lessons come out of that table. First, buying "architectural" shingles is not the same as buying impact resistance. Second, even among products built for it, Class 4 is a hard bar to clear, so check the product's actual listing rather than a sales brochure.
Do Class 4 shingles lower your insurance premium?
Often, yes, and Texas has a long history with this. IIBEC reports that Texas insurers began offering premium discounts in 1998 for impact resistant roofing, with Class 4 UL 2218 products qualifying, and other states followed.
The discount is not automatic, and its size is not the same everywhere. Here is how to make it work:
- Call your agent first. Ask whether your carrier offers a credit for Class 4 roofs and what percentage of the premium it covers.
- Ask which products qualify. Carriers often keep a list of eligible shingle lines. A shingle sold as "impact resistant" may not be on it.
- Ask what proof they need. Usually that's the product name, the UL 2218 class and a final invoice or certificate from the roofer. This is what people mean by a Class 4 roof certification.
- Get the answer in writing. Then compare the yearly savings with the extra material cost.
The Texas Department of Insurance also tells homeowners that roofing products tested under UL 2218 are classified 1 through 4 and recommends Class 4 where windborne debris is likely. That is guidance for Texas homeowners, not a rule for every state.
How much do impact resistant shingles cost?
Expect to pay more than for standard shingles. The premium is not a single fixed number, because the installed price of any roof depends on factors specific to your house. Compare quotes on these points:
- Roof size and pitch. Steeper, larger roofs take more material and labor.
- Product line. Class 4 lines differ in thickness, warranty terms and look.
- Tear-off and decking. Removing old layers and replacing rotted boards adds cost.
- Underlayment, valleys and accessories. A hail-ready system needs quality underlayment, sealed valleys and rated ridge caps and starter strips. Some manufacturers require matching accessories for their best warranties.
- Insurance credit. A yearly premium reduction offsets part of the upfront difference.
We don't publish a flat price because it would be wrong for most homes. A free inspection and written estimate gives you a real number for your roof, and you can ask for a Class 4 price and a standard price side by side.
Are impact resistant shingles worth it?
They are worth it when three things line up: you get hail often, you plan to stay, and your insurer gives a credit. If only one of those is true, the case is weaker.
A benefit-cost study from the University of Colorado found that impact resistant shingles more than pay for themselves where hail strikes about once a year or more. In Calgary, the same analysis found payback in about five years on average, assuming the roof is repaired every time it's damaged. Calgary is not Central Texas, but it shows the logic: the more often hail hits, the faster the upgrade earns its cost.
Quick decision guide
| Your situation | Likely best choice |
|---|---|
| Staying 10+ years, insurer offers a Class 4 credit | Class 4 |
| Hail hit your area recently, roof is due | Class 4 |
| Selling within a few years, no credit available | Standard or Class 3, compare quotes |
| Tight budget, older home, short horizon | Standard, and plan for storm deductibles |
Warranty and lifespan
Manufacturer lifetime warranties sound reassuring, but they usually exclude hail. GAF states hail damage is not covered under its limited warranty. Your homeowner's policy is what pays for hail, which is another reason the insurance conversation matters. We don't give a single lifespan number, because ventilation, installation quality and the storms your roof sees change it a lot. Ask for the written warranty on the exact product before you sign.
Our perspective
We install roofs across Central Texas, and the question we hear most is whether Class 4 is a sales upsell. It can be. It can also be the smartest part of a new roof. The difference comes down to your insurance policy and how long you'll own the house.
Our advice is plain. Get more than one estimate, ours included. Ask every contractor for the product name, the UL 2218 class and how the roof will be installed, not just the price per square. A great shingle on weak underlayment or sloppy flashing still leaks. If a storm has already hurt your roof, document it first and let us walk you through the claim before any work starts. A roof you understand is a roof you won't regret.
— Dan
Getting a Class 4 roof from us
We replace and repair asphalt shingle, metal and other roofs for homeowners in Central Texas, and we can quote impact resistant options next to standard ones so you can see the difference for your own house. Our Best Price Guarantee and free estimates mean you don't have to take our word for it: compare us with other bids. If you recently received an insurance payout for hail, our team can help you understand what the claim covers before you pick a material.
See our roofing replacement and repair services or read how we handle insurance claims. If your siding took a beating in the same storm, we also handle siding repair and replacement.
Your next steps
- Check your policy. Look for roof endorsements, the hail or wind deductible, and any impact resistance credit.
- Call your agent. Ask which Class 4 products qualify and what paperwork they require.
- Book a free inspection. Have a roofer look at your decking, ventilation and flashing, not just the shingles.
- Collect two or three written estimates. Ask for Class 4 and standard prices on the same scope.
- Confirm the details in the contract. Product name, UL 2218 class, underlayment, accessories, warranty and cleanup.
- Keep your paperwork. Send the invoice and product details to your insurer so the credit is applied.
FAQ
What is the difference between Class 3 and Class 4 shingles?
The difference is the test they pass. Under UL 2218, Class 3 withstands a 1.75-inch steel ball dropped from 17 feet, and Class 4 withstands a 2-inch ball from 20 feet. Class 4 is the highest rating and the one most insurers reward.
Do Class 4 shingles lower insurance?
Often they do. Texas insurers have offered discounts for Class 4 roofing since 1998, but each carrier sets its own credit and its own list of approved products. Ask your agent for the percentage and the proof they require before you buy.
Are Class 4 shingles hailproof?
No. The rating means the shingle resisted cracking through in a lab test. Dents, granule loss and damage from very large hail can still occur, and manufacturer warranties generally exclude hail. Your homeowner's policy is the protection for storm damage.
Are impact resistant shingles worth the extra cost?
They tend to be where hail is frequent, you'll stay in the house for years, and your insurer gives a premium credit. Research finds the upgrade pays for itself where hail strikes roughly once a year or more. If you may sell soon and get no credit, compare a standard roof.
How do I prove I have a Class 4 roof?
Keep the invoice showing the product name and its UL 2218 Class 4 rating, plus any manufacturer documentation. Many insurers accept that as certification. Ask your agent exactly what they want so the discount is applied.
Sources
- Testing of Impact-Resistant Asphalt Shingles, IIBEC
- Questions to Ask Your Contractor Before You Build or Repair, Texas Department of Insurance
- UL Solutions and IBHS on residential roofing shingles
- IBHS Impact Resistance Test Protocol for Asphalt Shingles
- New Asphalt Shingle Hail Impact Performance Test Protocol, Natural Hazards Review
- Relative Impact Resistance of Asphalt Shingles, IBHS
- A Benefit-Cost Analysis of Impact-Resistant Asphalt Shingle
- Class 3 vs Class 4 Shingles Understanding Your Options, GAF
- US Composite Slate Roofing Market 2026