Flat roofs don't usually fail overnight — they show warning signs years in advance. Here are the 7 signs to watch for on NYC flat roofs.
1. Ponding Water
Water sitting on your roof more than 48 hours after rain is a code violation under most warranties.
2. Bubbles, Blisters, or Wrinkles
Surface bubbles indicate either trapped moisture below the membrane or membrane separation.
3. Granule Loss
When you see granules in your gutters or drains, the asphalt below is exposed to UV — accelerated failure follows.
4. Cracking and Alligatoring
"Alligator skin" pattern of small cracks = the roof has lost its flexibility and is at end of life.
5. Failed Seams
Lifting edges, separated seams, or tar repairs at seams indicate failing membrane.
6. Active Interior Leaks
Ceiling stains on your top floor mean water is getting through.
7. Roof is 15+ Years Old
If yours is at or near the end of expected life, plan for replacement before catastrophic failure.
Not sure? Request a free inspection — a real roofer will climb your roof and give you an honest assessment.