Storm Damage on an Asphalt Shingle Roof

What Does Hail Damage Look Like on Asphalt Shingles?

The signature mark is a bruise: a roughly circular soft spot where the hailstone fractured the fiberglass mat and crushed granules down into the asphalt. Press it with a thumb and it gives slightly. Sometimes a faint dark ring outlines the impact where displaced granules left the asphalt exposed.

Fresh hits are darker than anything aging produces, because they expose black substrate that hasn't seen sunlight since the shingle left the factory. Some of the clearest bruises hide along the shadow line at the bottom edge of each tab, where the overhanging shingle above concentrated the impact.

The pattern is as telling as any single mark. Hail doesn't aim, so hits scatter randomly across the slope rather than clustering where water runs or where feet have walked. If every mark sits in a traffic path or along a worn drainage line, you're probably looking at something else, and we cover the full storm picture on our hail damage page.

What Does Wind Damage Look Like?

Wind damages asphalt shingles by lifting them, and the evidence is mechanical rather than impact-shaped. The most common mark is a horizontal crease across a tab where repeated lifting and slapping fractured the mat along a line. A creased tab is broken even when it lies back down flat.

Stronger gusts snap tabs off entirely, usually at the nail line, leaving rectangular gaps with exposed nail heads and bare underlayment. Just as damaging are the shingles that lifted without tearing: their factory seal strips broke, so the next storm gets underneath and peels them further.

Chicagoland doesn't need hail for any of this. Derechos and ordinary thunderstorm gusts crossing DuPage, Will, and Kane counties crease and strip asphalt tabs several times a season. You can confirm the wind speeds for a specific date through the National Weather Service, which is the same record adjusters check.

How Do Adjusters Tell Storm Damage From Wear?

Adjusters work from a method, not a glance. The core tool is the test square: a marked 10-by-10-foot section on each slope where the inspector counts qualifying hits one by one. The count per square, not the general look of the roof, drives the storm-damage finding.

Directionality gets checked next. Hail and wind arrive from a bearing, so damage should run heavier on the windward slopes and lighter on the sheltered ones. Damage spread evenly across every exposure reads as aging.

Then comes accessory corroboration. Soft metal doesn't wear into dents, so dings in vents, gutters, and flashing prove impact happened at this address, on this date. Thresholds for how many hits justify replacement vary by carrier and policy, which is why the documentation from a free storm damage roof inspection matters more than any adjective in a report.

What Gets Mistaken for Hail (and Shouldn't Be Claimed)?

Blistering is the big one. Heat and small manufacturing pockets in the asphalt pop open, exposing granule loss inside a raised rim, and from a few feet away a popped blister looks like a hail hit. It's the most common false positive on asphalt roofs, and an experienced inspector separates the two by the raised rim and the absence of mat fracture.

Thermal cracking, scuff marks from foot traffic, and manufacturing defects round out the list. All of them are wear or defect, none of them are a covered storm peril, and adjusters recognize each on sight.

Filing wear as storm damage gains you nothing. The claim gets denied, and the filing still sits on your loss history when a legitimate storm hits next year. A straight contractor tells you which one you have before you file, and sometimes the honest answer is that there's nothing to claim.

When Is Asphalt Storm Damage Repairable, and When Is It Replacement Territory?

Wind damage repairs well when it's isolated. A handful of creased or missing tabs on an otherwise sound roof is a straightforward fix, typically in the $400 to $1,500 range covered in our roof repair cost guide, and it's often not worth a claim against your deductible.

Hail bruising is different because it's distributed. You can't patch forty fractures scattered across a slope, so documented hail commonly supports slope or full replacement on a claim, subject to your carrier's threshold and policy terms. The numbers for that path live in our hail damage repair cost guide.

Age tips the scale too. Asphalt past 15 years turns brittle, and brittle shingles crack when a repair crew lifts them to work, so a spot repair on an old roof often creates new damage around the patch. That's when the repair versus replacement math shifts, even for modest storm damage.

Related Decisions

• Hail damage roof repair and free inspection
• What hail damage repair costs in Chicagoland
• Roof repair vs replacement: which call fits your damage