What Size Hail Damages a Roof? An Oklahoma Hail Size Chart

After a hailstorm rolls through Tulsa, the first question most people ask is a simple one: was it big enough to hurt my roof? Social media fills up with photos of hail next to quarters and golf balls, and everyone's trying to figure out whether to call a roofer or forget about it.

Hail size is the best single clue you have. It isn't the whole story, since wind, roof age and material all matter, but it tells you a lot about whether damage is likely. This guide covers what size hail damages a roof, how different roofing materials hold up, what to check after a storm, and when an inspection is worth it.

The Hail Size Chart for Oklahoma Roofs

Hail is usually measured by comparing it to common objects. The National Weather Service uses 1 inch, about the size of a quarter, as its threshold for a severe thunderstorm. Here's how sizes line up with typical roof damage:

These thresholds are general. A 1-inch storm with 60 mph wind can do more damage than a 1¼-inch storm with no wind, because wind-driven hail hits the roof at an angle and harder.

Why Size Isn't the Whole Story

Wind speed and direction

Wind turns falling hail into thrown hail. Slopes facing the storm take far more damage than the opposite side. It's common for one side of a Tulsa roof to be badly bruised and the other side to look fine.

Hail density

A few stones are different from a sheet of hail. Hailstones with jagged edges or a hard, clear core cause more damage than soft, slushy ones of the same size.

Roof age and condition

Shingles get more brittle as the asphalt ages in Oklahoma heat. Hail that bounces off a 3-year-old roof can crack a 15-year-old one. If your roof is already past its prime, smaller hail matters more.

Roofing material

Different roofs hold up very differently:

If you're replacing a roof anyway, Class 4 shingles are worth a look in Tulsa. Many Oklahoma insurers offer a discount for them; the Oklahoma Insurance Department has cited savings around 25%, though it varies by carrier. Details in our Class 4 shingles guide.

How to Measure Hail Safely

If you can do it safely after the storm passes, measure a few of the larger stones right away, before they melt. Lay them next to a coin or a ruler and take a photo with your phone. That photo, with its time stamp, is useful later if you file an insurance claim.

Don't go out during the storm, and don't climb on the roof afterward. Wet, hail-covered shingles are slick, and the damage you're looking for is hard to see from up there without training anyway.

What Hail Damage Looks Like

On shingles, hail damage usually looks like:

• Dark spots or bruises where granules were knocked off
• Soft spots that feel spongy when pressed, where the mat underneath cracked
• Exposed fiberglass mat in the center of a hit
• Granules piling up at downspouts and gutter ends

Around the house, look for clues at ground level:

• Dents in gutters, downspouts and the AC unit's fins
• Chipped paint on siding, trim and fences
• Torn window screens
• Dented mailboxes or car hoods

If hail did damage at ground level, it likely hit the roof harder. Our guide to identifying hail damage has photos and more detail.

Soft Metals: The Adjuster's Hail Gauge

Insurance adjusters look closely at soft metals: aluminum vents, pipe-boot collars, gutters, and flashing. These dent at sizes that may not break a shingle. The size and spacing of those dents helps an adjuster confirm what size hail hit your roof and from which direction.

That's why a good storm inspection photographs every dented vent and gutter, not just the shingles. It builds the evidence for the claim.

After the Storm: What to Do

1. Stay safe. Stay off the roof and away from downed lines.
2. Stop active leaks. Move belongings, catch drips, and call for a tarp if water is coming in.
3. Document. Photograph hail with a coin for scale, plus any damage you can see from the ground.
4. Get inspected before you file. A free inspection tells you whether the damage is worth a claim. If it isn't, you haven't opened one.
5. Don't wait too long. Bruises fade and later storms muddy the timeline. Oklahoma policies must allow at least 24 months to file a roof claim, but sooner is always better.

Our full hail damage claim guide walks through filing step by step.

Typical Tulsa Storm Scenarios

Quarter-size hail with strong wind

One of the most common Tulsa storm patterns: 1-inch hail driven by 50 to 60 mph winds out of the northwest. Front-facing slopes on that side of the house take the hits; the opposite slopes look untouched. Gutters and the AC unit on the windward side show dents. On a 15-year-old architectural roof, that's often enough for claimable damage on one or two slopes, and sometimes the whole roof depending on the policy and the adjuster's findings.

Golf ball hail, no question

When 1¾-inch hail falls across a neighborhood, damage is widespread on most shingle roofs. The hard part isn't knowing there's damage; it's getting documented quickly, before crews from out of state start knocking on doors. Get a local inspection, file, and take your time choosing a contractor.

Pea-size hail on an old roof

Small hail rarely damages a sound roof, but on a brittle 20-year-old roof, even small hail plus wind can knock granules loose and crack shingles. If your roof is old, a storm that didn't hurt the neighbors' newer roofs might still have hurt yours.

Common Mistakes After a Hailstorm

• Climbing on the roof. Wet, hail-covered shingles are dangerous, and walking on bruised shingles can cause more damage.
• Filing before an inspection. A claim with no covered damage can still go on your record. Inspect first.
• Waiting a year. Bruises fade, later storms muddy the date, and evidence gets harder to tie to a specific storm.
• Signing with a door-knocker. Storm chasers follow big hail. Check licensing and local history first. See storm chaser scams.
• Ignoring soft metals. Dented vents and gutters are evidence. Photograph them.

Frequently Asked Questions About Hail Size and Roof Damage

What size hail damages a roof?

Older and 3-tab shingles can bruise at about 1 inch (quarter size). Standard architectural shingles usually start taking real damage around 1¼ inches. Golf ball hail (1¾ inch) damages most shingle roofs.

Can pea-size hail damage a roof?

Rarely, on a sound roof. Small hail can damage very old, brittle shingles, especially when it's driven by high wind.

Can a roof have hail damage I can't see?

Yes. Hail bruises crack the shingle mat without tearing the surface, and they're hard to spot from the ground. Dents in gutters and vents are good signs the roof took hits too.

Do Class 4 shingles stop hail damage?

They resist it far better than standard shingles and are rated to withstand a 2-inch steel ball test. Very large hail can still mark them.

How long do I have to file a hail claim in Oklahoma?

Oklahoma law requires policies with a roof time limit to allow claims up to 24 months after the date of loss. File as soon as you can after an inspection confirms damage.

Not Sure If Your Roof Took a Hit?

You don't have to guess. Our storm inspections are free: we inspect the roof, gutters, vents and siding, chalk and photograph every hit, and tell you straight whether it's a repair, a claim, or nothing to worry about. See how it works on our storm and hail damage page, or book a free storm inspection.

We inspect after storms across Tulsa, Broken Arrow, Owasso, Bixby, Jenks, Coweta and Catoosa.

Related Reading

• Tornado vs. Hail vs. Wind Damage
• How to Spot Roof Damage After a Tulsa Storm
• Roof Insurance Supplements, Explained

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Sources and disclaimer. Information in this article comes from public sources such as the National Weather Service, the Oklahoma Insurance Department, Oklahoma statutes and manufacturer documentation, plus RainTech’s own inspections and claims experience in the Tulsa area. It was current as of September 24, 2026; laws, insurance rules, manufacturer terms and prices change. This article is general information, not legal, insurance, tax or financial advice.