Class 4 impact-resistant shingles vs. standard shingles: worth it in hail country?

My honest take on the upgrade

For many North Texas homeowners who plan to stay in their house for years, Class 4 impact-resistant shingles are worth considering, because they are built to resist hail better than standard shingles and some insurers offer a premium credit for them. They are not hail-proof, the rating describes performance when new, and the value depends on your insurer's discount, how long you will own the house and what the price difference is on your roof. The right answer comes from putting those numbers side by side, not from a sales pitch.

At Verde Roofing we install both standard and impact-rated shingles, and storm work is the core of what we do. I see what hail does to roofs every season. This guide explains what the rating actually means, how the two kinds of shingle differ, and how to decide whether the upgrade pays for your house.

What a Class 4 rating actually tests

Class 4 refers to the top tier of UL 2218, a standardized impact test. The Insurance Institute for Business and Home Safety describes it this way: steel balls of different sizes are dropped on the roofing product, and it receives a Class 1 through 4 classification based on how it performs. Class 4 corresponds to a 2-inch steel ball, while Class 1 starts at 1.25 inches. After two impacts in the same spot, the product passes if no crack is visible on the back of the shingle.

That tells you something useful, and it also has limits. IBHS notes that test standards like this evaluate new products and do not account for the effects of weathering, temperature and aging. A roof that has spent several summers in the sun is not the same roof that passed the test. IBHS has developed its own hail test using laboratory-made hailstones that looks at a range of damage, including dents, granule loss and tears or cracks, and rates products accordingly. Its point is simple: not every product with the same label performs the same.

How impact-resistant shingles are built differently

According to IBHS, there are two ways to make an asphalt shingle impact resistant: add a reinforcing scrim backing, or use polymer-modified asphalt, which makes the shingle more flexible so it absorbs a strike instead of fracturing. IBHS says polymer-modified shingles are becoming the more common type.

We install Malarkey shingles, and Malarkey describes its shingles as made with polymer-modified, rubberized asphalt. On its product page, Malarkey lists its Vista AR, Legacy Scotchgard and Windsor Scotchgard lines as carrying a Class 4 impact rating, and its Highlander AR line as Class 3. We also install Owens Corning shingles. When we quote an impact-rated roof, we name the exact product so you can look up its rating yourself.

• Standard architectural shingle: fiberglass mat, asphalt and granules, rated for wind but not tested to the top impact class.
• Class 3 shingle: passes the UL 2218 test with a smaller steel ball than Class 4.
• Class 4 shingle: passes with the 2-inch ball, the top of the scale.
• Polymer-modified shingle: more flexible asphalt, often the route to a Class 4 rating.

Where the insurance credit comes in

The Texas Department of Insurance says roofing materials may be eligible for discounts on your insurance, that a Class 4 roof covering would receive the highest premium credit, and that the amount is set by each insurance company. Each company also decides which test criteria it accepts, how products must be labeled and what paperwork it needs. TDI's own installation form, PC068, is one example of the certification a contractor fills out for the credit, and TDI notes that products without the required labeling may not qualify.

So the first step is not a roofing quote. It is a call to your agent asking three questions: does my insurer credit impact-resistant roofs, how much is the credit on my policy, and what documentation do you need from the roofer. Ask as well whether choosing that roof changes anything else in the policy, such as how cosmetic damage is treated. If your premium has been climbing, this is one of the levers worth knowing about, alongside the others in what to do when a homeowners renewal jumps.

Running the numbers on your own house

Once you know the credit, the math is straightforward. Take the price difference between a standard shingle and a Class 4 shingle on your roof, and compare it with the annual premium credit multiplied by the years you expect to stay. Then add the part that is harder to price: the chance that a moderate hailstorm leaves a Class 4 roof intact where a standard one would need a claim, a deductible and a replacement.

That last part is not guaranteed. A large enough hailstone damages any shingle, and as noted above, the rating describes a new shingle, not one that has baked through several Texas summers. What the upgrade buys you is better odds in a moderate storm, which is where a tougher shingle has the best chance of making the difference between a claim and no claim. Our guide on what drives the cost of a new roof explains the other lines on the estimate that affect the comparison.

• Price difference for Class 4 on your specific roof.
• Annual insurance credit, in dollars, from your agent.
• Years you expect to stay in the house.
• Your wind and hail deductible, which you avoid paying if a moderate storm leaves the roof undamaged.
• Any policy changes tied to the credit.

When I would choose standard shingles instead

Class 4 is not automatically the right call. If you plan to sell within a year or two and your insurer offers little or no credit, the upgrade may not come back to you. If the claim is covering a standard shingle and the budget for an upgrade is tight, a good standard shingle with correct flashing, underlayment and ventilation will serve you better than a premium shingle installed carelessly.

I also remind owners that impact rating is one property among several. Wind matters too: IBHS explains that shingle wind resistance depends on how well the sealed shingle resists uplift, and lists wind classifications of 60, 90 and 110 miles per hour under one common standard. A shingle with a great impact rating still needs to seal and be nailed properly to stay on the roof.

Shingles are not the only route, either. We also install metal, tile, stone and slate, and each behaves differently in hail. Metal can shrug off strikes that would crack a shingle but may dent in ways that are cosmetic yet visible. Tile and slate are durable in many ways but can crack under a heavy stone, and broken pieces need prompt replacement. Those materials also cost more and can be heavier, so they are a different decision from the shingle-to-shingle comparison in this guide.

Upgrading during an insurance claim

Many of our customers make this decision in the middle of a claim. The insurer typically pays to replace what you had, like for like. If you had standard shingles and want Class 4, you usually pay the difference yourself. That can be a sensible moment to upgrade, since the tear-off and labor are already being paid for and you are only covering the material difference.

Be careful with anyone who suggests the insurer should simply pay for the upgrade, or offers to make the difference disappear on paper. That crosses into the territory I describe in roof claim myths that cost homeowners money. An honest contractor shows you what the claim covers, what the upgrade costs and lets you decide.

Getting the paperwork right

If you choose an impact-rated roof to get a credit, the documentation matters as much as the shingle. Ask your roofer to give you the product name, its impact classification and the completed certification form your insurer requires, then send it to your agent and confirm the credit appears on your next declarations page. Keep a copy with your house records; you may need it at renewal or if you sell.

Keep the shingle wrapper or a photo of the labeled packaging as well. TDI notes that product labeling is part of how insurers verify a qualifying roof, and having it on file saves a scramble later.

The same file helps when you sell. An impact-rated roof with documentation is something a listing can point to, and a buyer's insurer may ask about it when they quote the house. Without the paperwork, the roof is just a roof. With it, the next owner can claim whatever credit their own carrier offers, and you can show that the upgrade was real.

Talk it through with someone who sees hail every season

Hail is part of life across Dallas–Fort Worth, and the spring storm season brings it most years, as I explain in what North Texas weather does to a roof. That makes the impact-resistant question a real one here, not a theoretical one.

When you are ready, we will inspect your roof for free, price both a standard and an impact-rated option side by side and show you exactly which products we would use. We work across Collin, Dallas, Denton, Tarrant and the surrounding counties. Bring your agent's answer on the credit, and we can work out together whether Class 4 pays for your house.

Questions people ask me