Damage identification

What hail damage looks like, and what it is usually confused with

Hail damage is a specific thing with a specific appearance, and three other conditions get mistaken for it constantly. Two of those are age, one is a manufacturing characteristic, and none of them is a storm loss.

What hail actually does to an asphalt shingle

A hailstone hitting a shingle does two things at once: it knocks granules off, and it bruises the mat underneath. The bruise is the important part. Press a thumb on it and it feels soft, like the give in a bruised apple, because the reinforcing mat has fractured beneath an intact surface. That fracture is what shortens the life of the shingle — the exposed asphalt now degrades where it is no longer protected.

The pattern is random. Hail does not respect courses or edges: it hits where it hits, across slopes, and it hits the soft metals too. Which is why the fastest way to confirm hail is not the roof at all.

The three things it gets confused with

Blistering

Small round craters where a gas bubble in the asphalt broke open. They look remarkably like hail hits, and the giveaways are that the edges are sharp rather than soft, there is no bruise underneath, they are spread evenly over all slopes including ones hail could not reach, and there is no matching damage on the soft metals. This is a manufacturing and heat characteristic, made worse by a hot unventilated attic.

Granule loss from age

Follows the path water takes: heaviest below valleys, under the drip line of an upper roof, and along the flow lines down the slope. Age is patterned; hail is random. Ages tell you the roof is old, not that anything happened to it.

Mechanical damage

Scuffs and scrapes from foot traffic, ladders, or a satellite dish installation. Concentrated on the access route and around whatever was worked on, which is a pattern nothing meteorological produces.

Size matters, and so does the wind behind it

One inch is the conventional threshold at which hail starts doing real damage to an asphalt shingle mat, and it is not a hard line. Small hail driven by a strong wind hits harder than the same stone falling still, an older brittle shingle bruises at a size that would bounce off a new one, and a slope facing into the storm takes more than the one behind the ridge.

The seven-county record from 2021 onward is short at the top end. The largest recorded stone in that window was 2 inches, in Butler County, on 16 May 2025. The recorded storm dates page lists every hail event of an inch or more with its date and county, and Storm Check filters the same data to your ZIP code.

How hail damage is documented properly

1. Establish the date first

   Not the day the stain appeared. The day of the event, matched against what NOAA recorded near the address. Everything in a claim hangs off the date of loss.

2. Chalk a test square

   The standard method is a marked square on each slope, with the hits inside it counted. It converts "there is hail damage" into a number an adjuster can verify.

3. Photograph the soft metals

   Dents on a gutter, a vent hood or an air conditioning fin are corroborating evidence that a shingle bruise on its own is not.

4. Photograph by slope, with orientation

   North, south, east and west, separately. Directional damage is expected and it strengthens the account of what happened.

5. Note what is not damaged

   An honest report says which slopes are clean. A report that finds damage on every surface of every elevation invites scrutiny of all of it.

The awkward local truth

Hail gets the attention because it is dramatic and because it drives the storm-chasing sales industry. In this metro it is the less common problem by a factor of more than five. If someone knocks on your door after a storm and leads with hail, ask which recorded event they mean and check the date. The events that damage roofs here most often are wind days, and wind damage looks completely different — creased shingles along a course, unsealed tabs and missing ridge cap.