The signs of hail damage are easy to miss from the driveway, so it pays to know exactly what you’re looking for before anyone climbs a ladder.
A hailstorm leaves a trail. It dents soft metal, chips paint, knocks granules loose and bruises shingles in a pattern that looks nothing like normal wear. Read that trail in the right order and you’ll know whether you have a story worth telling your insurance agent, or just a noisy afternoon.
This guide works like a case file. You’ll start on the ground, size up the hail, learn what an impact does to a shingle, separate real signs of hail damage from look-alikes, and finish with the next steps and the red flags that show up at the door after every big storm.
Check for signs of hail damage on soft metal and downspout outlets first, from the ground. Random dents, spatter marks and fresh granules point to hail. Call your insurance agent before signing anything, get written estimates from local roofers, and never sign over your insurance check.
What’s In This Guide
Start on the Ground: Signs of Hail Damage You Can See Safely
Stay off the roof. The Insurance Institute for Business & Home Safety says dents and spatter marks on air conditioners, gutters, flashing, downspouts and patio furniture help confirm that a hail event happened. Those are the first signs of hail damage to check, and every one is visible from the yard.
Dented Gutters and Downspouts
Look along the face of the gutters and down the downspouts for round dings. Aluminum dents easily, which makes it a good record of the storm.
Flattened A/C Fins
The thin metal fins on an outdoor condenser bend under hail, making them one of the quickest signs of hail damage to spot. Check the top and the side that faced the storm.
Spatter Marks
Fresh hail knocks dirt and oxidation off painted metal, decks and fences, leaving bright round spots. They fade over time, so photograph them right away.
Dinged Vents and Flashing
Roof vents, pipe collars and metal flashing sit on the roof but can often be seen from the ground with binoculars. Dents there are strong signs of hail damage nearby.
Granules at the Outlets
A fresh pile of dark sand where downspouts empty means granules came off the shingles. Heavy rain can do this too, so treat it as one of several signs of hail damage, not proof.
Photograph Everything
Take dated photos of every clue, plus a wide shot of each side of the house. Good notes now make every later conversation shorter.
The Hail Size Gauge
Size is the first question anyone will ask. Pick the size you saw. The National Weather Service uses everyday objects to estimate hail, and calls a storm severe at 1 inch (a quarter) or larger.
Pea Size: 0.25 Inch
Below severeWell under the severe line. One storm of hail this small rarely breaks a shingle, but it still knocks granules loose.
Downspout outlets for fresh granules. Note the date. Small storms add up over the years.
Log it with your photos. No call needed unless you find other signs of hail damage.
Penny Size: 0.75 Inch
Below severeStill sub-severe. In IBHS lab tests, a run of impacts under 1 inch stripped more granules than a single 2-inch hailstone.
A/C fins, gutter faces and spatter marks on painted metal.
Photograph and log it. If the roof is older, ask for a look at the next routine inspection.
Quarter Size: 1 Inch
NWS severe thresholdThis is where the National Weather Service calls a storm severe. Soft metal usually shows it clearly.
All five ground clues. Count dents on one downspout to gauge how hard the house was hit.
If you find several signs of hail damage, call your insurance agent and book a professional inspection.
Golf Ball Size: 1.75 Inches
Well above severeHail this size can bruise and crack shingles, and IBHS notes that ridge caps are especially vulnerable.
Ground clues, then binoculars on the ridge, vents and the slope that faced the storm.
Call your agent, then have a roofer check for bruises by hand. Tarp any opening right away.
Baseball Size: 2.75 Inches
ExtremeBigger than the 2-inch steel ball used in the top UL 2218 impact test for shingles.
Look for broken shingles, cracked skylights and dented siding from the yard. Check ceilings for leaks.
Report it to your insurer the same day and get the roof covered before the next rain.
Sizes and the severe threshold: National Weather Service. Tap any size to switch.
What Hail Does to a Shingle
The roof-level signs of hail damage belong to a roofer on a harness, not a homeowner on a ladder. Still, knowing what they look for helps you read the report.
Random Impact Marks
Dark spots where granules were knocked away, scattered with no pattern. IBHS lists a random pattern of impact marks as a core sign of hail.
Bruises and Cracks
A bruise is a soft spot that gives when pressed, where the mat underneath was crushed. Larger stones can crack or break shingles outright, and ridge caps are especially exposed.
Hail or Look-Alike?
Not every bare spot is hail. Inspectors separate true signs of hail damage from wear, defects and foot traffic by the pattern. Here’s how the most common confusions break down, based on IBHS guidance.
| What you see | Points to hail | Points to something else |
|---|---|---|
| Granule loss | Round spots scattered at random | Wear along shingle edges, or even loss across the whole roof |
| Dark marks | Matching dents on nearby soft metal | Scuffs in walking paths or near where work was done |
| Pits or bubbles | Soft bruise under the spot | Blisters or product defects with no impact |
| Granules in gutters | Fresh pile after a known hailstorm | Heavy rain or a roof near the end of its life |
The tell: hail doesn’t pick favorites. Real signs of hail damage show up on the roof and on the metal around it, from the same storm, facing the same direction.
Why Small Hail Still Matters
A peer-reviewed IBHS study in Frontiers in Materials fired ice at installed shingles to see what happens when hail never reaches the severe line.
The authors tested six products and call for more research, so treat these as early findings. The practical lesson holds: log every storm, even the small ones, because the signs of hail damage can build up long before a roof leaks.
Your Next Steps and the Red Flags
Do This, in This Order
Once you’ve found signs of hail damage, the order of your next calls matters.
- Document. Dated photos of every clue and each side of the house.
- Call your agent first. IBHS recommends reporting suspected damage to your insurance agent before anything else.
- Stop the water. If anything is open, have it tarped right away.
- Get written estimates. The Ohio Attorney General advises getting written estimates from at least three contractors.
- Keep the check. Don’t sign your insurance check over to a contractor.
Red Flags at the Door
- No ID, no address. No permanent business location or references.
- Big money up front. A demand for half or more of the job before work starts.
- Nothing in writing. A refusal to give a written estimate.
- “Sign today.” Pressure that ignores your three-business-day right to cancel a door-to-door sale.
Source: Ohio Attorney General.
The Takeaway Worth Sharing
Read the metal before you read the roof. The gutters will tell you if the shingles need a closer look.
Send this to a neighbor who just heard hail on the skylight.
Found the Clues? Get a Straight Answer
Thrush & Son®: family-owned exterior pros since 1960.
If you’re in the Miami Valley and you’ve found signs of hail damage, read the Thrush & Son® guide to how hail affects roofing, then book an inspection with a local crew.
➡️ Schedule in Dayton➡️ View All ServicesCall (937) 833-5136 · 115 Jefferson St, Brookville, OH 45309
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Further Reading
Official sources: National Weather Service, IBHS, Frontiers in Materials, the Ohio Attorney General and GAF (UL 2218 test).
Signs of Hail Damage FAQ
What are the first signs of hail damage to look for?
Start on the ground: dents in gutters and downspouts, flattened A/C fins, bright spatter marks on painted metal, and fresh granules where the downspouts empty.
Can small hail damage a roof?
It can add up. In IBHS lab tests, repeated impacts under 1 inch stripped more granules than one 2-inch hailstone, and weathered shingles were about ten times more susceptible to later large hail.
How do I tell hail damage from normal wear?
Look at the pattern. Hail leaves random impact marks and matching dents on nearby metal. Wear shows up along shingle edges or evenly across the roof.
Should I call my insurance company or a roofer first?
IBHS recommends calling your insurance agent first. Then get written estimates from local, insured roofers with a permanent address, and never sign your insurance check over to a contractor.
Written by Corey Thrush, Vice President and third generation of Thrush & Son®.
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