What hail does to each roof type
Hail doesn't damage every roof the same way, and much of it can't be seen from the ground or from inside:
- TPO and PVC: fractures in the membrane, often small circular or star-shaped cracks, and crushed insulation or cover board underneath. Older, more brittle membranes are hit hardest
- EPDM: rubber absorbs impact well, but large hail can puncture it or damage the insulation below
- Modified bitumen and built-up: bruised spots where granules or gravel were knocked away, and cracks in the cap sheet
- Metal: dents in panels, damaged seams and coatings, and split sealant at fasteners and flashings
- Coated roofs: cracked or chipped coating that exposes the roof below
- Shingles: bruises, lost granules and cracked mats on steep-slope buildings
- Everything else: skylights, rooftop unit fins and hoods, vents, gutters and edge metal
