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Hail · Checked 1 Oct 2026Hail-resistant roofing in Oklahoma usually means Class 4 shingles, but the state’s FORTIFIED™ roof grant asks for something stricter. Shingles must score Good or Excellent in IBHS’s own hail tests, and in IBHS’s 2025 ratings no shingle scored Excellent.
Source: IBHS FORTIFIED Roof standard; OID OKReady.
| UL 2218 Class 4 | IBHS hail rating | |
|---|---|---|
| What hits the shingle | A steel ball, dropped | Lab-made hailstones, fired at speed |
| Where the shingles come from | Submitted for certification | Bought off retail shelves by IBHS |
| What’s judged | Pass or fail on cracking | Dents, tears and granule loss, scored Poor to Excellent |
| Meets the Oklahoma grant? | For metal and low-slope roofs only | Good or Excellent, for shingles |
| Hail size in mind | Test ball up to 2 inches | Meant to protect against hail up to 2 inches |
IBHS, 19 Nov 2025; IBHS FORTIFIED Roof standard.
IBHS released its largest set of shingle ratings on 19 November 2025. No product rated Excellent. Trade press counted 18 rated Good. Reports differ on the exact total tested (23 or 24) and whether any rated Poor.
A third-party roundup (June 2026) lists these as Good: GAF Timberline AS II, Malarkey Legacy, CertainTeed NorthGate ClimateFlex, CertainTeed Belmont IR, Owens Corning Duration FLEX, Atlas StormMaster Shake and PABCO Prestige. It lists TAMKO StormFighter FLEX, IKO Nordic and Malarkey Vista AR as Marginal.
Check the product your roofer quotes in the IBHS ratings tool before you sign. Ratings can change and these names come from a secondary source.
Every product IBHS rates is impact-resistant to begin with. The rating separates the ones that hold up best when hit by something closer to real hail. A shingle can carry a Class 4 label and still score Marginal, which wouldn’t meet the Oklahoma grant.
Ask your roofer: “Which shingle, and what’s its IBHS rating?”
Baseball to grapefruit-sized hail.
Together with the storm six days earlier, about $1 billion in damage.
About 14 miles long and up to 1.1 miles wide; 24 deaths.
OID issued claims guidance after the 5 to 6 March storms and the 23 April Enid storm.
KFOR; NWS Norman; OID releases. No roof stops a direct hit from a violent tornado; FORTIFIED is built for the hail and high wind that do most roof damage.
Not on their own. Asphalt shingles must be rated Good or Excellent by IBHS. Class 4 is enough for metal and low-slope roofs.
A June 2026 roundup lists products from GAF, Malarkey, CertainTeed, Owens Corning, Atlas and PABCO. Check the exact product in the IBHS ratings tool.
No product rated Excellent in the 2025 ratings released on 19 November 2025.
An add-on to the FORTIFIED Roof standard that sets hail requirements for the roof covering. Oklahoma’s grant requires it.
We’ll pass your details to one FORTIFIED roofer near you. Ask them which IBHS-rated shingle they’d use. Also see what it costs.