How to Spot Storm Damage on a Roof

What to look for from the ground

You can spot a meaningful amount of storm damage without getting on the roof, which is safer and still informative.

Shingles

Look for shingles that are missing entirely, curled at the edges, cracked, or visibly out of alignment with the surrounding pattern. Wind can lift and crack shingles without tearing them off completely, which means a roof can have wind damage that isn't obvious as a gap.

Granule loss

Asphalt shingle granules protect the shingle from UV and weather. After a hailstorm, check your gutters and the ground near downspouts for an accumulation of these granules, which look like coarse, colored sand. Heavy granule loss is a sign of impact damage even when individual shingles look intact from a distance.

Dents on metal surfaces

Hail dents on gutters, roof vents, flashing, or window screens are one of the more reliable visual proxies for roof hail damage, since these metal surfaces show impact marks more clearly than shingles do. If you see dents on these lower, easier-to-inspect surfaces, it's a reasonable signal to have the roof itself checked.

Debris and displaced material

Tree limbs, branches, or other wind-blown debris on the roof can cause impact damage beyond what's visible on the ground. Check your yard and gutters for shingle fragments or granules after any storm with high wind.

Signs from inside the attic or top floor

A ceiling stain that appears after a storm is one of the clearest indicators that the roof has been breached somewhere, even if you can't see the breach from outside. Daylight visible through the roof deck from inside the attic is a direct sign of a hole or gap. A musty smell in an upper-floor room after a storm can mean water intruded through the roof even without a visible interior stain yet.

Why timing matters in Michigan

Southeast Michigan's tornado and severe storm activity peaks in June, with most tornado-producing storms occurring between April and August, according to the National Weather Service's Detroit/Pontiac office. Hail frequently accompanies these same severe thunderstorm systems. Because roof damage isn't always immediately obvious, and because the EPA's 24-to-48-hour mold-growth window applies to any water that gets in through a compromised roof, a post-storm inspection soon after a severe weather event is more useful than waiting until a leak shows up on its own.

Why not just wait for a leak?

A leak means water has already found its way past the roof's protective layers and into the structure. Catching damage before that point, missing granules, dented vents, cracked shingles, means addressing it before water intrusion starts, rather than after.

What to do once you've spotted possible damage

Photograph what you see from the ground and from inside the attic, with a note of the storm date, before arranging any inspection. If your homeowners policy covers wind or hail damage to the roof, this documentation supports that claim regardless of which contractor eventually does the repair. A roof inspection performed by a licensed professional, ideally one who will put findings in writing rather than a verbal walk-around, gives you something concrete to compare against your insurer's own assessment if there's a disagreement about the extent of damage.

A caution about storm-chasing roofers

Severe weather events in Michigan reliably bring traveling contractors into affected areas soon after a storm. A roof inspection offered for free, immediately after a storm, by someone going door to door isn't automatically untrustworthy, but it's worth pairing with your own visual check from the ground and, ideally, a second opinion, before committing to repairs based on a single inspection performed under time pressure.