APP / Bituminous Membranes
A proven, heavy-duty sheet membrane system, torch-applied for roofs and terraces that face constant sun and weather exposure.
What it is
APP (Atactic Polypropylene) modified bituminous membranes are factory-manufactured sheet membranes made from bitumen modified with polymers for improved flexibility and UV resistance. They're rolled out and torch-applied to bond to the substrate, forming a heavy-duty waterproofing layer.
How it works
Membrane rolls are laid out over a primed surface and heated with a torch as they're unrolled, melting the underside so it bonds directly to the substrate. Sheets are overlapped at the edges and sealed to form a continuous barrier.
When it's used
- Large, relatively flat terraces and roofs with sustained direct sun exposure
- Applications where a thick, heavy-duty membrane is preferred over a thinner coating
- Re-roofing projects where a proven, long-standing system is preferred
Advantages
- High resistance to UV exposure and weathering over time
- Thick, robust membrane suited to high-traffic or exposed roof areas
- A long-established system with a well-understood installation process
Not sure which system your problem needs?
The right system depends on your specific site condition. Show us the problem and we'll confirm the right approach.
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