EPDM & Rubber Roof Repair in Philadelphia

EPDM is a synthetic-rubber membrane, usually black, and it is one of the most common flat-roof systems on Philadelphia rowhomes. It is durable when it is installed and maintained well, but like any flat roof it ages, and when it does the failures show up in a predictable handful of places.

How EPDM and rubber roofs fail

The usual suspects, in rough order of how often they cause a leak:

• Open seams. The bonded overlap between two sheets lifts as the adhesive ages.
• Flashing failures. Where the membrane turns up to meet a parapet, vent, or pipe, the detail cracks or pulls away.
• Punctures. Dropped tools, foot traffic, or debris tear the membrane.
• Shrinkage and brittleness. Years of sun pull the membrane tight and harden it, so it splits, often near the edges.
• Ponding damage. Standing water in a low spot breaks the membrane down faster than anywhere else.

How the repair works

A good repair starts with finding the actual leak, which is rarely directly above the stain on your ceiling. The roofer cleans and dries the area, then bonds a compatible patch or reseals the seam or flashing so it becomes one continuous watertight surface again. The key word is compatible: the patch material has to match the membrane, and the surface has to be dry, or the repair will not hold. This is why a patch slapped on during a leak rarely lasts, and why active leaks often need emergency tarping first, then a proper repair once the roof dries out.

Repair, recoat, or replace?

If the membrane is sound and the failure is local, repair it. If it is sound but drying out across the whole roof, a coating can buy added years. If it has shrunk, gone brittle, or is failing in several spots, you are usually better off putting that money toward replacement. An honest roofer will tell you which one you are looking at after walking the roof. For the full repair-versus-replace breakdown, see the flat roof repair guide.

What rubber roof repair costs

There is no flat price. A single seam or puncture repair is a small job; a roof with failures in several places, or one that needs flashing rebuilt, costs more. The big drivers are how many failures there are, how easy the roof is to reach, and whether water has already gotten into the insulation or decking underneath.

EPDM & rubber roof repair across Philadelphia

We handle rubber-roof repair across the city, including Fishtown, South Philadelphia, Northeast Philadelphia, Fairmount, Port Richmond. See all neighborhoods →

Keep reading

• Flat roof repair in Philadelphia: the full guide
• Emergency Roof Leak Repair, best for an active leak coming through the ceiling right now.
• Flat Roof Replacement & Coating, best for a roof past patching, or one you want to extend a few more years.