If you searched for a class 4 shingles list, you probably want two things: the names of the impact-resistant shingle lines you can ask for, and a straight answer on whether Class 4 is worth it in Oklahoma. Here is the short version. Class 4 is the highest rating on the common impact-resistance scale, which comes from a lab test that drops steel balls onto roofing samples. It means a shingle came through the toughest version of that test. It does not mean hail-proof. Several manufacturers market lines built for it, and the list below names the ones our crews install most, with every detail flagged to be checked against the manufacturer's current documents. Whether Class 4 is the right call for your roof depends on how long you will own the house, how much hail exposure you are planning for, and what your insurer does with an impact rating, which is a question for your agent.
This page does not list prices and does not promise any insurance result.
Key takeaways
- The most common impact scale runs from Class 1 to Class 4, and Class 4 is the top. The rating comes from a standard lab test, not from real hailstorms.
- A Class 4 shingle can still be damaged by large hail or hard wind-driven impacts. The rating lowers the odds of damage; it does not remove them.
- Impact-rated lines are separate products from the standard architectural lines. Each one has its own name, color list and warranty.
- Some insurers offer a discount for impact-rated roofing, and others do not. Ask your agent before you decide, and read your policy.
- Product lines and ratings change. Verify the exact line and rating on the manufacturer's current spec sheet and get it written into your estimate.
What does Class 3 or Class 4 actually mean?
The impact-resistance rating most roofing manufacturers use comes from a laboratory test called UL 2218. In general terms, the test drops a steel ball from a set height onto the roofing material, and the roofing either holds up or it does not. Each class uses a bigger ball than the one before it.
In plain language:
- Class 1 is the lightest rating on the scale.
- Class 2 steps up to a larger test ball.
- Class 3 steps up again.
- Class 4 uses the largest ball in the standard test, commonly described as about two inches across, and it is the top class.
After the impact, the sample is examined for cracking or fracturing. A shingle earns a class by passing without failing in the way the standard defines. That is why you will often hear the phrase "passed" next to a class number.
There is a second thing to understand. A steel ball is not hail. Real hailstones vary in density, shape and speed, and they arrive with wind behind them, which can change how hard they hit. The test is a way to compare products under the same conditions. It is useful, and it is not a promise about any one storm.
If you want to see how often large hail actually shows up in the Oklahoma City metro, the National Weather Service's Storm Prediction Center publishes preliminary storm reports. In those reports, Oklahoma County logged 38 days with reports of hail of one inch or larger between 2021 and the fall of 2026, and Cleveland County logged 32. These are preliminary reports, they only list hail of one inch or larger, and counties with more people tend to produce more reports, so treat them as a rough picture of how common big hail is, not a forecast.
Which shingles are on a class 4 shingles list?
Several manufacturers market impact-rated shingle lines. The lines below are the ones the crew at Total Roof Protection OKC has installed or discussed, and they are named here as examples, not as a complete or ranked list. Check each manufacturer's current product page for the exact rating, colors and warranty before you rely on any of it.
| Manufacturer | Impact-rated line named by our crew | What to confirm on the spec sheet |
|---|---|---|
| GAF | Armor Shield II | Current impact class, available colors, warranty terms |
| Tamko | Storm Fighter | Current impact class, available colors, warranty terms |
| Owens Corning | Duration FLEX and Duration STORM | Current impact class for each line, colors, warranty terms |
Other manufacturers also sell impact-rated lines, so this is not everything on the market. When you ask a roofer for a quote, ask for the manufacturer, the exact line name and the color, and ask that all three appear on the estimate. "Class 4 shingles" is a category, not a product.
A related point comes up in the field. The owner of Total Roof Protection OKC mentions that GAF's standard Timberline HDZ line has been described as Class 3 in some listings. We have not confirmed that against a current spec sheet, so we are not stating it as fact here. This is exactly the sort of detail that should be read from the manufacturer's own document for your specific color, because ratings can differ by product and by color.
How does Class 3 compare with Class 4?
| Topic | Class 3 | Class 4 |
|---|---|---|
| Position on the scale | Second-highest | Highest |
| Test ball | Smaller than Class 4 | Largest in the standard test |
| Product type | Some standard architectural lines are listed at this class; verify per line | Dedicated impact-rated lines from several manufacturers |
| Hail-proof? | No | No |
| Insurance discount | Depends on the insurer and policy | Depends on the insurer and policy |
| Cost relationship | Usually lower than Class 4 | Usually higher than Class 3; ask for an itemized estimate |
| Best fit | Owners who want a step up from basic without the highest-rated line | Owners with higher hail exposure or longer plans to stay |
"Usually lower" and "usually higher" in the table describe the typical relationship, not any specific number. Your actual estimate depends on the roof, the line and the work needed. We do not publish prices on this page.
What is a Class 4 shingle not?
It helps to be clear about what the rating does not cover.
- It is not hail-proof. Large stones or hard wind-driven hits can still damage an impact-rated roof. It may show marks, lose granules or take damage that an inspector has to look at closely.
- It is not a guarantee about your policy. An impact rating does not decide how an insurance claim is handled. That is up to your insurer and the terms of your policy.
- It is not just about the shingle. Underlayment, decking, flashing and ventilation still matter. A Class 4 shingle on a poorly prepared deck is not a good roof.
- It is not the same across every product. Ratings, colors, warranties and manufacturer programs vary by line. Verify each one.
- It is not required. Plenty of Oklahoma homeowners choose a standard architectural shingle and are comfortable with that decision. The point is to make the choice with the facts.
Do insurers give discounts for Class 4 shingles?
Some insurers offer a premium discount for impact-rated roofing. Others do not, or they only offer it in certain situations, or the discount has conditions attached. We are not an insurance agency and we cannot tell you what your policy does. What we can say is this: before you pay extra for an impact-rated line, ask your agent whether your carrier offers a discount for it, what paperwork they require and how much of the cost it might offset over time. Get the answer in writing if you can, and read your policy.
Do not assume that choosing a particular shingle will change how a future claim is handled. Treat any discount as a separate question from the roof itself.
When is Class 4 worth considering in Oklahoma?
There is no rule that fits everyone, but there are questions that help you decide.
- How long will you own the house? The longer you plan to stay, the more seasons the roof has to prove itself.
- How much hail exposure do you think you have? Roofs on open lots and on slopes that face the prevailing storm direction see more hits. A house tucked among trees may see less direct impact.
- What does your insurer offer? If a discount exists, it is part of the math. If it does not, it is not.
- What is your budget? An impact-rated line costs more than a basic line. Ask for the standard line and the impact-rated line side by side on one estimate so you can see the difference in your own situation.
- What matters to you about the look? Impact-rated lines have their own color lists, so check that your preferred color exists in the line you want.
If you are comparing the standard architectural options first, our guide to GAF Timberline HDZ vs Owens Corning Duration vs Tamko Titan XT walks through that decision.
What does our crew do in the field?
These are observations from our own work, not manufacturer claims. The owner of Total Roof Protection OKC regularly puts impact-rated lines on roofs in the metro, and his posts mention installs using Tamko's Storm Fighter and GAF's Armor Shield II. He also mentions roofs where the standard line was swapped for an impact-rated one as an upgrade on the job. The wording of any offer like that is something we review carefully before it appears anywhere on this site, and nothing on this page is an offer.
He also talks about a few practical points that affect any shingle. Delivery timing can slip, and a missing color can delay a roof, so crews sometimes pick a line partly based on what arrives on schedule. When the weather turns, a roof that is partly open gets tarped so the work can continue the next day. And, on any roof, the old material needs to come off cleanly so the new system sits on a sound deck. If you want to know what we do about the layer under the shingles, read our comparison of synthetic underlayment vs felt.
What mistakes do homeowners make with Class 4 shingles?
- Buying "Class 4" without naming the product. Ask for the exact line, color and manufacturer on the estimate.
- Assuming it is hail-proof. It is better described as more resistant to a standard impact test.
- Assuming a discount. Verify it with your insurer before you count on it.
- Forgetting the rest of the system. Decking, underlayment and flashing matter too.
- Comparing estimates that are not like for like. Put the standard line and the impact-rated line on the same estimate from the same contractor, and ask others to do the same.
- Trusting any single list, including this one. Product names and ratings change. Check the manufacturer's current document.
What should you ask your roofer about impact-rated shingles?
- Which exact line and color are you quoting, and who makes it?
- What impact class does the manufacturer's current spec sheet show for that line and color?
- Can you quote the standard line and the impact-rated line side by side?
- What warranty paperwork do I receive, and what does it say about hail?
- What else is included in the system, such as underlayment and accessories?
- Will the old roofing come off down to the deck?
Frequently asked questions
Is there a single official class 4 shingles list? No. Manufacturers publish their own impact-rated product lines, and ratings can change. Use the manufacturers' current product pages and spec sheets as the source, and treat any list, including this one, as a starting point.
Is Class 4 hail-proof? No. Class 4 is the top rating on a standard lab test, which uses steel balls. Real hail varies, and large stones or wind-driven hits can still damage an impact-rated roof.
Does Class 4 lower my insurance premium? It can with some insurers and not with others. Ask your agent whether your carrier offers an impact-rated roof discount, what proof they need and how it applies to your policy.
What is the difference between Class 3 and Class 4? Both are classes on the same impact scale, and Class 4 uses the largest test ball. Which products carry which class varies by line and sometimes by color, so check the spec sheet for the exact product you are considering.
Is Timberline HDZ a Class 3 or Class 4 shingle? Ratings differ by product, and we have not confirmed this against a current manufacturer document, so we are not stating one. Read GAF's current spec sheet for the exact line and color you are quoted.
Can I upgrade just part of my roof to Class 4? That is a question for your roofer and the manufacturer's installation and warranty rules. Mixing lines can affect appearance and coverage, so ask before you decide.
Does a Class 4 roof need less maintenance? Any roof benefits from periodic inspection, especially after a storm. An impact rating does not replace inspections.
Want to see the options on your house?
We can look at your roof, talk through the standard and impact-rated lines that suit your house and neighborhood, and put them side by side on an itemized written estimate. An inspection tells you about the roof. It does not predict or replace your insurer's decision, and we will not tell you otherwise. Call Total Roof Protection OKC at 405-415-5841.