Clear HDPE Cavity Drain Membrane with Integrated Mesh for Above and Below Ground Waterproofing Biokil Crown 8mm Meshed Membrane Clear is a high-quality, high-density polyethylene (HDPE) cavity drainage membrane featuring an integrated mesh surface. This provides a secure mechanical key for direct plaster or render finishes. With an 8mm stud profile, it is suitable for internal waterproofing and damp-proofing applications above and below ground, including basements, vaults, and retaining walls. The clear construction enables substrate visibility during installation, ensuring accurate fixing and detailing. Key Features & Benefits Mesh-Faced Surface: Provides a strong bond for plaster, lime mortars, or renders without the need for additional boarding. 8mm Stud Profile: Creates an effective air and drainage gap behind the membrane. Clear HDPE Construction: Allows visual inspection of the substrate during and after installation. Damp & Salt Isolation: Physically separates wall finishes from damp, contaminated, or friable substrates. Internal Use: Ideal for both heritage refurbishments and modern waterproofing systems in basements or ground floors. Product Details Material: High-Density Polyethylene (HDPE) with welded mesh layer Stud Height: 8mm Thickness: Approx. 1.0mm Colour: Clear with white mesh face Roll Size: Typically 2m x 20m (40m²) Weight: Approx. 0.65 kg/m² Installation: Fix with Brick Plugs with Seals or Nu-Seal Plugs at 250mm centres Finishing: Direct plaster, render, or lime mortar onto the mesh face SKU: BCMESH8CLR Application Instructions Surface Prep: Remove loose material and ensure surface is reasonably flat. Full substrate drying is not required. Fixing: Secure membrane with plugs and integrated seals at regular intervals. Mesh side should face into the room. Joint Sealing: Overlap the mesh and seal membrane joints with Sealing Tape or Overtape for a watertight finish. Apply Finish: Directly render, plaster, or apply lime mortar to the mesh surface as per manufacturer guidance. Limitations Not suitable for direct floor use — use compatible floor membranes for horizontal applications. Protect from UV exposure before covering with finish. Health & Safety Non-hazardous. Wear gloves during installation to avoid abrasions. Refer to the product’s Safety Data Sheet (SDS) for full handling information.
