8mm Meshed Membrane - Clear HDPE Cavity Drain Membrane with Integrated Mesh - Biokil Crown

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

1. Surface Prep: Remove loose material and ensure surface is reasonably flat. Full substrate drying is not required.
2. Fixing: Secure membrane with plugs and integrated seals at regular intervals. Mesh side should face into the room.
3. Joint Sealing: Overlap the mesh and seal membrane joints with Sealing Tape or Overtape for a watertight finish.
4. 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.