HDPE Membrane
High-density polyethylene sheet with a coated face, laid before concrete is poured so that the concrete bonds mechanically to it.
On an actual building
That bond is the point: water cannot travel laterally between the membrane and the structure, which is the failure that defeats loose-laid below-grade systems. Laid the wrong way up, it loses that property entirely.
What we most often have to correct
That any tape will seal the laps. The tape is part of the system and is not interchangeable between manufacturers.
Terms that come up alongside this one
- Positive Side Waterproofing
Waterproofing applied to the face water arrives from — the external side of a basement wall or the top of a slab..
- Box Type Waterproofing
A continuous barrier wrapping an entire below-grade structure — beneath the raft, up every retaining wall and sealed above ground level — so the structure effectively sits inside a sealed box..
- Bentonite
Sodium bentonite clay, supplied in panels or geotextile-encased sheets, which swells on contact with water to form a dense self-sealing gel against a structure..
HDPE Membrane — questions we get asked
What does hdpe membrane mean in waterproofing?
High-density polyethylene sheet with a coated face, laid before concrete is poured so that the concrete bonds mechanically to it.
Why does hdpe membrane matter on a real project?
That bond is the point: water cannot travel laterally between the membrane and the structure, which is the failure that defeats loose-laid below-grade systems. Laid the wrong way up, it loses that property entirely.
What do people commonly get wrong about hdpe membrane?
That any tape will seal the laps. The tape is part of the system and is not interchangeable between manufacturers.
Have a building showing this?
If a term on this page describes something you are looking at, a site inspection will tell you how far it has gone and what it needs. It costs nothing.
Mon–Fri 08:00–18:00 · Sat 09:00–16:00 · Jogeshwari West