Flat Roof Leaks in Philadelphia Rowhomes
Where flat and rubber roofs on Philly rowhomes usually leak, warning signs, and what to do.
Most Philadelphia rowhomes have flat or low-slope roofs. They work well when maintained, but water that can't drain will find the weakest point.
Where flat roofs usually leak
- Seams and old patches
- Flashing at party walls, parapets and chimneys
- Around vent pipes, skylights and roof hatches
- Spots where water ponds because a drain, scupper or gutter is clogged
Warning signs
- Ceiling stains on the top floor, especially after storms
- Peeling paint along the top of walls
- Standing water on the roof days after rain
- Overflowing rear gutters
Maintenance that helps
- Keep drains, scuppers and gutters clear, especially after fall leaves.
- Have flashing and seams checked periodically.
- Fix small problems before they reach the ceiling.
Related: roof repair · roof leak repair · ceiling leak repair
FAQ
Can a flat roof be patched, or does it need replacing?
Many leaks are fixed with a targeted repair of the seam or flashing. Widespread failure may call for a bigger job.
How do I know if my roof is ponding?
Look for standing water a day or two after rain, or for dirt rings where water sat.