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9 Aug 2026

Waterproofing Membrane Types Compared

Membrane waterproofing comes in several material types, each suited to different areas of a building. Here is a plain-language comparison.

Bituminous membranes

Bitumen-based membranes are a widely used, cost-effective option for terraces and roofs, applied either as a torch-applied sheet or a liquid coating. They perform well under direct sun exposure but need proper surface preparation to bond correctly.

APP (Atactic Polypropylene) membranes

APP-modified bitumen membranes offer better heat resistance than standard bitumen, making them a common choice for terraces that face intense summer sun, since they resist softening and deformation better over time.

EPDM and HDPE membranes

EPDM (a synthetic rubber membrane) offers strong flexibility and UV resistance, often used where movement (thermal expansion/contraction) is a concern. HDPE membranes are commonly used below ground — basements and foundation walls — for their strength and resistance to soil moisture and chemicals.

Which one is right for your property

The right membrane depends on the specific area (terrace vs. basement vs. wall), sun exposure, and expected movement in the structure — not a single "best" option across the board. A free inspection lets us recommend the right membrane type for your specific area, with a written quote and warranty.

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