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 made worse by heat, 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, and on this coast it shortens it twice over — the exposed asphalt now degrades where the granules no longer protect it, in the strongest ultraviolet load of any part of the roof’s life.

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, and a hot unventilated attic in this climate produces it reliably. It is the single most common false positive on a Houston roof.

Ultraviolet cracking and granule loss

Age, and here it arrives early. Granule loss from weathering follows the path water takes: heaviest below valleys, under the drip line of an upper roof, and along the flow lines down the slope. Cracking follows the sun, so it concentrates on the south and west. Age is patterned; hail is random. Both tell you the roof is old, not that anything happened to it.

Mechanical damage

Scuffs and scrapes from foot traffic, ladders, or a satellite or solar installation — and a hot asphalt shingle scuffs very easily, so this is more common here than in a cooler market. 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 record for this service area reaches well into that last row. The largest stones logged from 2021 onward are 2.75″, at 16 March 2024 in Fort Bend County, and 31 May 2024 in Galveston County. Recorded storm dates lists every hail report of an inch or more with its date and county, and Storm Check filters the same data to your ZIP code.

The seasonal pattern nobody mentions

Hail here is a spring peril, sharply. 89 percent of the recorded hail reports in this window fall between March and June, and the record is nearly empty from July onward. That matters for two reasons. First, if somebody is at your door in October describing hail damage, ask which date they mean. Second, and more usefully: a mat bruised in April has the whole tropical season ahead of it, and wind-driven rain finds a fractured mat that ordinary rain runs straight off. That sequence is the subject of hurricane season roof prep and it is the most consequential thing on this page.

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, a turbine or a condenser 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.

Before you decide it is worth a claim

Check your deductible first. In Texas the wind and hail deductible is frequently a percentage of the dwelling coverage limit rather than a flat amount, which means it is larger than most people assume and it is the same size whether the damage is one slope or the whole roof. A genuine hail claim can still be below it. Percentage deductibles explains how to work out the real number, and it takes about thirty seconds once you have the declarations page in front of you.