Wind Creases or Hail Impacts: Which Pattern Matters Most?

The direction of the lifted tabs is useful, but it should be documented spatially rather than described only in words. Photograph each crease and suspected impact mark with a ruler or other scale reference in the frame, then mark its approximate location on a simple roof sketch.

A repeated line or concentration of creases on similarly oriented slopes can help an inspector assess a wind-uplift pattern. Isolated circular bruises or fractures, especially when accompanied by corresponding marks on vents or gutters, may support a hail assessment, but scattered granule loss alone remains nonspecific. Include overview photographs as well as close-ups, and note the roof slope and compass direction for each image.

For anyone documenting similar storm damage, attic checks can add useful context before an exterior inspection. Look for daylight around fasteners or seams, damp insulation, and fresh water staining, especially below diagonal crease areas. A crease that looks minor from above can still have broken the shingle mat or exposed the underlayment, creating a leak path.

Wet insulation or dripping calls for prompt protection and inspection rather than relying only on exterior photos. Record the interior location so it can be matched to the roof sketch. No interior staining does not rule out damage, since water can travel along rafters or decking, but these findings can help establish urgency while the wind-versus-hail pattern is being sorted out.

I would not try to call wind vs hail from photos alone. Before an inspection, shoot the same areas from farther back and then close up with something for scale, note which slope and where on the roof each set is from, and look for matching dents or marks on soft metal like vents gutters and downspouts from the ground. Granule loss by itself is pretty nonspecific. Skip climbing if it is steep or wet and use a qualified inspector for anything you cannot safely document.

Not a diagnosis and not insurance advice.

A storm timeline can be as useful as attic findings when documenting similar damage. Note the storm date, when lifting or creases were first noticed, and any temporary protection or water entry. Before an inspection, avoid cleaning, sealing, or replacing questionable shingles unless safety requires it. Those changes can remove evidence needed to distinguish wind uplift from impact damage and make the original claim scope harder to assess. Photograph any emergency work and keep invoices or removed materials if replacement is unavoidable.

Document what’s happening beneath the displaced granules before cleaning or sealing. A true hail bruise usually has a localized depression with crushed or fractured asphalt and may involve the fiberglass mat. Wind damage more often presents as a linear fold, crease, or tear along the shingle.

Don’t probe aggressively or lift shingles to check this. Use close-up photos at an angle with a scale reference, and leave inspection of the mat to a qualified professional if the damage isn’t clear. Granule loss by itself still isn’t enough to classify the cause.