What Is Hail Bruise?
When a hailstone strikes a shingle, it drives the granules into the asphalt and flexes the fiberglass mat past its limit. The result is a bruise: a roughly circular mark where granules are crushed or displaced, the asphalt shows dark, and — the defining feature — the spot feels soft under thumb pressure like an apple bruise, because the mat beneath is fractured. The shingle still sheds water that day; the damage is functional because the fracture and exposed asphalt now age at a different rate than the surrounding shingle, cracking through over the following seasons. Diagnosis is about pattern as much as the mark: real hail lands randomly across a slope, hits harder on the sides facing the storm, and leaves collateral dents in soft metals — vents, gutters, window wraps — that fake or misread damage lacks. Homeowners should look at ground-level metals first, then have suspect slopes inspected. In Central Texas, the spring hail season makes this the region's dominant roof-damage question.
Important Distinction
Note: A bruise is impact damage: random spatter distribution, granules driven IN, mat soft or fractured beneath, often paired with dented soft metals. A blister is heat damage from within: popped-outward craters, sometimes in patterns, no mat fracture, no corresponding metal dents. The distinction decides many hail claims.
Also Known As
These are the search terms and phrases that commonly refer to this topic, so you can find it however you describe it.
How Hail Bruise Relates to Other Topics
A hail bruise is a fracture under intact granules and feels soft like a bruised apple; a blister is a popped bubble with granules missing from its crown - and blisters appear in random scatter even under trees and overhangs where hail cannot reach.
Functional hail damage is the bruise: the fiberglass mat fractured beneath granules that may still look fine. Press it - a bruise gives softly underfoot or thumb, and that fracture is what shortens the shingle's life, not the cosmetic mark.
Adjusters chalk a 10-by-10-foot test square on each roof slope and count hail bruises inside it; the count per square, per slope, is what the carrier's repair-or-replace math actually runs on.
A fresh hail bruise can keep its granules; weeks later the fractured spot sheds them and shows as a dark dot from the ground - which is why hail damage that 'appears' months after the storm was usually there all along.
Related To Hail Bruise
The Class 4 test grades exactly one thing - whether the mat cracks - which is the same fracture a hail bruise is; the rating is best read as bruise resistance, not as a promise the roof will look untouched after a storm.
Questions about Hail Bruise?
Zilker Roofing inspects before recommending. Honest assessment, no pressure.