Do Class 4 Impact-Resistant Shingles Lower Oklahoma Insurance?
Yes — many Oklahoma insurers offer a premium discount for Class 4 (UL 2218) impact-resistant shingles, because they withstand hail far better than standard shingles. In a hail-prone state, the discount plus the added durability often makes them well worth the upgrade.
What 'Class 4' means
Class 4 is the highest impact rating in the UL 2218 standard — the shingle survives a steel-ball drop test simulating large hail without cracking. These shingles use a tougher mat and modified asphalt to resist bruising and granule loss.
| UL 2218 class | Steel ball drop survived | Practical meaning |
|---|---|---|
| Class 1 | 1.25 in | Minimal impact resistance |
| Class 2 | 1.5 in | Modest improvement |
| Class 3 | 1.75 in | Meaningful, but not the discount tier |
| Class 4 | 2 in | Highest rating; the tier carriers discount and the one worth buying in Oklahoma |
The grant most Oklahoma homeowners don't know about
Beyond the carrier discount, Oklahoma runs the Strengthen Oklahoma Homes (SOH) program through the Insurance Department. It pays a grant of up to $10,000 toward upgrading a roof to the IBHS FORTIFIED Home™ – Roof™ – High Wind standard with the Hail Supplement — and the money goes directly to your contractor once the work is finished and the FORTIFIED certificate is issued. As of January 2026 the program is available in all 77 Oklahoma counties.
FORTIFIED is a step beyond simply buying a Class 4 shingle. The designation requires the whole assembly to hold together: enhanced roof deck attachment, a sealed roof deck, locked-down roof edges, impact-resistant shingles, and wind- and rain-resistant attic vents. That is why it earns a separate insurance credit — Oklahoma law requires admitted carriers to offer a discount for FORTIFIED-designated homes, though the size of it varies by company, so confirm yours with your agent.
| Requirement | Detail |
|---|---|
| Grant amount | Up to $10,000, paid directly to the contractor |
| Property type | Owner-occupied primary residence, single-family — no apartments, duplexes, condos, or manufactured/mobile homes |
| Insurance | Proof of active homeowners insurance including wind coverage |
| Standard | FORTIFIED Home™ – Roof™ – High Wind, with the Hail Supplement |
| Availability | All 77 Oklahoma counties as of January 2026 |
How to get the discount
- Confirm your carrier offers an impact-resistant roofing discount (most major Oklahoma insurers do)
- Install a Class 4 product and keep the manufacturer certification documentation
- Provide the certificate to your insurer to apply the credit
- If you're replacing anyway, ask whether a FORTIFIED roof and an SOH grant are worth pursuing
If you are already replacing a roof after hail, that is the cheapest moment you will ever have to move up to Class 4 — the tear-off is paid for either way. And if you can meet the FORTIFIED standard, the state grant and the required carrier discount can together outweigh the upgrade cost outright.
Frequently asked questions
Are impact-resistant shingles worth it in Oklahoma?
For most Oklahoma homeowners, yes. They resist hail damage, can extend roof life, and frequently qualify for a homeowners-insurance premium discount that offsets the higher upfront cost over time.
What is a Class 4 shingle?
Class 4 is the highest impact rating under UL 2218. The shingle must survive a 2-inch steel ball dropped onto it without the mat cracking. Class 4 products use a tougher mat and modified asphalt to resist bruising and granule loss, and it is the tier insurers typically discount.
Does Oklahoma give grants for a stronger roof?
Yes. The Strengthen Oklahoma Homes program, run by the Oklahoma Insurance Department, pays up to $10,000 toward upgrading a roof to the IBHS FORTIFIED Home™ – Roof™ – High Wind standard with the Hail Supplement. The grant is paid directly to your contractor after the work is completed and certified, and the program covers all 77 counties as of January 2026. It applies to owner-occupied single-family primary residences with active wind coverage.
What is the difference between a Class 4 shingle and a FORTIFIED roof?
A Class 4 shingle is one impact-rated product. FORTIFIED is a whole-assembly standard — it additionally requires enhanced roof deck attachment, a sealed roof deck, locked-down roof edges, and wind- and rain-resistant attic vents. Oklahoma law requires admitted carriers to offer a discount for FORTIFIED-designated homes; the amount varies by carrier.