TPO Membrane
Thermoplastic polyolefin single-ply sheet, typically 1.2 to 1.8 mm, whose seams are joined by hot-air welding rather than adhesive.
On an actual building
A correct weld produces a homogeneous joint as strong as the sheet itself. Its reflective white surface reduces roof heat gain, which suits large industrial and warehouse roofs.
What we most often have to correct
That welding is set-and-forget. Weld quality depends on temperature and speed, so trial welds are made at every shift and whenever conditions change.
Terms that come up alongside this one
- Cool Roof
A roof finished in a high-reflectance surface to reduce solar heat absorbed into the building..
- APP Membrane
Atactic-polypropylene-modified bitumen sheet, torch-applied to a primed substrate with lapped and sealed joints.
- Holiday / Spark Testing
A test that passes an electrical charge over a coated surface to locate pinholes, voids and discontinuities — 'holidays' — that are invisible to the eye..
TPO Membrane — questions we get asked
What does tpo membrane mean in waterproofing?
Thermoplastic polyolefin single-ply sheet, typically 1.2 to 1.8 mm, whose seams are joined by hot-air welding rather than adhesive.
Why does tpo membrane matter on a real project?
A correct weld produces a homogeneous joint as strong as the sheet itself. Its reflective white surface reduces roof heat gain, which suits large industrial and warehouse roofs.
What do people commonly get wrong about tpo membrane?
That welding is set-and-forget. Weld quality depends on temperature and speed, so trial welds are made at every shift and whenever conditions change.
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