An External Drainage Membrane is a two-core drainage sheet consisting of a non-woven geotextile filter layer thermally welded to a water impermeable HDPE (High Density Polyethylene) drainage membrane.

External Drainage Membranes provide outstanding drainage and protection to the outside face of basement walls to sloping sites, preventing the build-up of water pressure and protecting the structure from aggressive water, chemicals and toxins.

Explore our range of External Drainage Membranes, manufactured to the highest quality by the most reputable UK and European Brands.