Wind and Hail Damage: What Roof Inspectors Look For

Every roof in Macomb County ages the same slow way and gets hit by weather the same fast way, often in the same season. An inspector's entire job after a wind or hail event is separating those two processes on one roof, using evidence instead of impressions. This guide walks through that method: the specific marks wind leaves, the specific marks hail leaves, the collateral clues on the soft metal around the roof that corroborate a hit, and why a written, photographed record beats a strongly worded opinion every time. It is a technique guide. What a given insurance policy pays for is a separate question, covered in our storm and insurance claims guide.

01 / THE CORE SKILLSeparating an event from ordinary age

Two houses on the same street, same age of roof, can look completely different after a storm rolls through. One shingle field absorbs the wind and hail with barely a mark. The next one, installed the same year by the same crew, shows creased tabs and bruised granules across an entire slope. Material batch, installation quality, and exact wind exposure all play a role, which is exactly why an inspector cannot assume damage from a storm date alone. The roof has to be read.

The skill is pattern recognition built on one question, asked of every finding: does this look like it happened gradually, over years of sun and freeze-thaw, or does it look like it happened on one specific day? Our companion guide on shingle inspection covers the full vocabulary of what a shingle field can show. This guide narrows in on the findings that point specifically to wind and hail, and the corroborating evidence an inspector checks beyond the shingles themselves.

02 / WINDWhat wind leaves behind on a shingle field

Wind damage has a directional logic to it, because wind comes from somewhere. An inspector notes which slope faces the prevailing direction of a known storm and expects the heaviest findings there, tapering off on the sheltered slopes. A pattern that ignores that logic, showing up evenly on every slope regardless of orientation, is a signal to look harder at age rather than a single event.

Creased and flipped tabs

When wind gets under the free edge of a shingle tab and bends it back, it can leave a visible crease line even after the tab lies flat again. The factory seal strip underneath is often broken at that crease line whether or not the tab looks obviously out of place from the ground, which is why a ground-level glance misses so many creases. A tab that has fully flipped over, showing its underside or the shingle course beneath it, is the same mechanism taken further, and it usually means the seal is gone entirely at that spot.

Torn, missing, and lifted tabs

A tab torn off completely, or a bare patch of exposed underlayment where a shingle used to be, is unambiguous. These are also the most urgent findings on the roof, since underlayment is only ever a temporary secondary barrier, not a finished roof surface. Lifted but intact tabs, still attached but standing proud of the field, sit between a crease and a full tear: the seal is broken, and the next wind event is more likely to finish the job.

Directional consistency across slopes

The strongest wind finding is not one creased tab. It is a cluster of creased and lifted tabs concentrated on the slope that faced the storm, with far fewer or none on the opposite slope. That directional consistency is what separates a genuine wind event from scattered findings that are more likely explained by age, poor original installation, or a roof simply nearing the end of its rated life on every slope at once.

Backed-out and popped nails

Strong, sustained wind can flex a shingle enough to work a nail head up through the mat over repeated gusts, even without tearing the tab loose outright. A backed-out nail sits proud of the surface as a small dark dimple, and it creates a direct path for water at that single fastener. Finding several on the same slope, roughly in a line along a course, is another directional clue worth logging alongside the creased tabs, since it points to the same wind event rather than a separate, unrelated problem.

03 / HAILBruising, blistering, and the test square method

Hail damage works differently than wind. Instead of lifting a shingle, a hailstone strikes it and fractures the mat underneath the granule layer, without necessarily tearing anything loose. That makes hail damage subtler to spot than a lifted tab, and it is where the distinction between a genuine impact and ordinary shingle wear gets its most technical.

Bruising versus blistering

A hail bruise typically shows as a small, roughly circular soft spot where the granules have been driven into the mat rather than simply worn away, often with a halo of granule loss around the impact point as displaced granules wash off in the next rain. Blistering, by contrast, is a raised bump caused by trapped moisture or gas inside the shingle expanding with heat, usually tied to attic ventilation rather than impact. The two can look superficially similar to an untrained eye; the giveaway is that a bruise has a firmer, denser feel under light pressure where the mat is compressed, while a blister is hollow and softer. Confusing the two in either direction is one of the most common mistakes in an amateur read.

Test squares and mapping the pattern

Rather than eyeballing an entire roof, a careful inspection marks out a handful of representative test squares, typically 100 square feet each, on different slopes and counts confirmed hail hits within each one. Mapping hit density by slope does two things: it corroborates that the pattern lines up with a specific storm's wind direction, since hail usually arrives at an angle rather than straight down, and it gives a repeatable, countable number instead of a subjective impression. Our companion guide on how test squares work covers the method in more depth.

Why hail severity is hard to eyeball

Two hailstorms with similar reported sizes can leave very different marks depending on wind speed at the time, the angle of impact, and the age and brittleness of the shingles already on the roof. Older, more brittle shingles bruise more readily than a newer roof hit by the same hail, which is part of why an inspector reads the roof itself rather than treating a reported hail size as a stand-in for confirmed damage. The test square count on the actual shingles is the evidence; the storm report is only context for where to look.

04 / COLLATERALThe soft metal tells its own story

A shingle field is not the only evidence on the property. Hail and wind strong enough to affect a roof usually leaves marks on softer materials nearby, and those marks are often easier to confirm than a subtle granule bruise, which is why a competent inspection checks them every time.

Gutters, downspouts, and flashing

Aluminum gutters and downspouts dent easily under hail impact, and fresh dents on the gutter's exposed top edge, matching the approximate size of the reported hail, corroborate a hit on the roof above the same spot. Soft aluminum step flashing and drip edge show the same kind of dimpling. Because these materials dent and stay dented, they hold a clearer, longer-lasting record of impact size and force than a shingle does.

Vents, caps, and other roof-mounted metal

Plumbing vent caps, turbine vents, and other soft metal roof penetrations bruise and dent in the same way as gutters, and because they sit at the same elevation as the shingle field, damage here is strong corroboration for damage on the surrounding shingles. A pristine vent cap next to a shingle area with claimed hail bruising is worth a second look; genuine hail rarely damages the shingles while leaving every piece of nearby soft metal untouched.

Screens, AC fins, and window-side evidence

Window screens, mesh vent covers, and the aluminum fins on an outdoor air conditioning unit are some of the softest materials on a property, and hail large enough to matter on a roof often bends or perforates them too. These are useful corroborating evidence precisely because they sit at ground level or near it, where a homeowner can safely photograph them without getting on a ladder, while the roof-level findings wait for a professional inspection.

Reading collateral evidence in context

Collateral damage is corroboration, not proof on its own. A dented gutter by itself could come from a ladder, a fallen branch, or normal handling over the years, so an inspector weighs it alongside the shingle findings and the storm date rather than treating any single dent as the whole case. Where collateral evidence earns its weight is in volume and consistency: several independent soft-metal surfaces on the same side of the house, all dented in a way consistent with the reported hail size, is a much stronger picture than one dented downspout standing alone.

05 / THE RECORDWhy documentation quality outranks adjectives

"Severe damage" and "significant hail impact" are opinions. A dated photo of a creased tab next to a dented gutter downspout, cross-referenced with a public storm event record, is evidence. The difference matters because every finding above is only as useful as the record built around it, and a strong record is built the same way every time, regardless of what the findings turn out to be.

What a thorough record includes

A proper inspection record includes wide shots that show which slope a finding is on and close-up shots that show the finding itself, a rough count of confirmed hits per test square where hail is suspected, notes on the corroborating collateral evidence found on gutters and vents, and the approximate date of the storm being evaluated against. None of that requires adjectives; it requires a camera, a tape measure, and a consistent method applied to the whole roof rather than the one spot that looks worst.

Anyone can say a roof looks bad. A useful inspection says which slope, how many confirmed hits per hundred square feet, and what corroborates it on the ground. That is the entire difference between an opinion and a record.

06 / THE LANEWhere inspection technique ends

Everything above is a description of how a roof is read, not a promise about what happens next. Homeowners insurance policies generally cover sudden damage from events like wind and hail, as distinct from gradual wear from age, but every policy reads differently, and the declarations page and the adjuster have the final word on any specific claim. Macomb County has a recent, documented event on record: the county was included in federal disaster declaration DR-4757 after the severe wind storms of August 2023, and roofs that were never inspected afterward can still be carrying undocumented damage from that date today.

Our role in that process is the inspection and the record: we walk the roof, photograph what we find on the shingles and on the collateral evidence around it, and can meet your adjuster on site to walk through the findings together. What we do not do, and what no roofing contractor can honestly do, is promise the outcome of a claim. That decision belongs to the insurer, based on the policy and the adjuster's own assessment. The full path from first photos to a finished claim is covered in our storm and insurance claims guide.

07 / NEXT STEPGetting your roof read properly

If a storm has come through Macomb County recently, or you simply are not sure whether last year's wind event ever got checked, the read above is exactly what a free inspection produces: a slope-by-slope look at the shingles, a check of the gutters, vents, and other soft metal for corroborating evidence, and a written, photographed report at the end of it. If the roof shows genuine event damage, you get that record. If what you are seeing turns out to be ordinary age, that is what we will tell you, plainly, with no push toward work the roof does not need.

Timing has its own logic here too. The marks described in this guide do not get easier to read as time passes; a creased tab left through another windy season is more likely to tear loose, and collateral dents on soft metal are easiest to correlate to a specific storm while the date is still recent and other properties nearby still show visible signs of the same event. If you suspect wind or hail damage, getting the roof looked at sooner keeps the record cleaner and the findings clearer, whatever they turn out to be. If it is more than an inspection can resolve, our repair and replacement guides cover what happens after the diagnosis, and the cost calculator gives you a ballpark either way.