FLAT ROOF SERVICES
Flat Roof Membrane Repair
EPDM, TPO, PVC, and modified bitumen all fail differently. We patch, heat-weld, and reinforce based on what’s actually on your roof — not a one-size-fits-all fix.
Matching the Repair to the Material
Modified bitumen and built-up (tar) roofs are typically repaired with heat-welded patches or a mastic-and-fabric system, feathered down at the edges so they don’t peel up later.
EPDM (rubber) seams are adhered, not welded — repairs use compatible seam tape or liquid-applied systems designed specifically for rubber. TPO and PVC are heat-welded single-ply membranes; repairs use the same heat-welding technique as the original installation for a genuinely bonded seam, not just an adhesive patch.
The Mixed-Material Problem
One of the most common issues we find on multi-patched roofs: someone layered an incompatible material over the existing roofing — EPDM over torch-down, for example — without proper transition detailing. It looks fixed for a while, then fails again at the same spot. Fixing this properly sometimes means removing the incompatible patch and redoing it correctly, not just patching over the patch.
Frequently Asked Questions
Can different roofing materials be patched together?
Not directly and reliably — different materials need proper transition detailing or compatible interface products. A mismatched patch is a common cause of repeat leaks.
How long does a membrane patch last?
A properly executed patch, matched to the existing material and reinforced correctly, commonly lasts several years or more. Mismatched or poorly bonded patches can fail within a season.