Materials
PVC Membrane Roof Repair
Similar in repair method to TPO — heat-welded seams — but a chemically different material that requires PVC-specific welding.
PVC (polyvinyl chloride) roofing is a single-ply membrane, often confused with TPO since both are heat-welded, white or light-colored, and reflective. They are chemically different materials, though, and PVC generally offers stronger chemical and grease resistance, which is why it’s common on roofs with rooftop kitchen exhaust or industrial equipment.
Repairs follow the same hot-air welding principle as TPO — heating the existing membrane and a PVC patch until tacky, then fusing under roller pressure — but PVC and TPO membranes should not be welded to each other; they require matching, compatible material.
As with TPO, the most common issues are seam failure, punctures, and flashing detail failures at penetrations. A properly executed PVC weld, done at the right temperature and pressure, creates a bond that’s often stronger than the surrounding membrane itself.
Not Sure What’s On Your Roof?
We identify the material and repair method during inspection.