
Hail bruises on the shingle field
Hail is the damage homeowners miss most often because it rarely leaks right away. According to the Insurance Institute for Business and Home Safety, hail roughly one inch across, about the size of a quarter, is the common threshold for functional damage to standard asphalt shingles, and insurers often use that mark as an informal cutoff. IBHS research reported in 2025 found that even sub-severe hail under one inch can reduce a shingle's resistance to future storms and accelerate normal aging. On the roof, hail leaves round bruises, soft spots that feel like a bruise on an apple, and knocked-loose granules that expose the black asphalt mat underneath.
- Field term: Hail bruise
- A soft, rounded spot on an asphalt shingle where a hailstone struck and fractured the mat beneath the granules. It often feels spongy like a bruise on fruit and may not leak right away, which is why hail damage is easy to overlook.


