8mm Membrane - Clear - Biokil Crown

£162.60

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Biokil Crown 8mm Membrane – Clear is a high-capacity cavity drainage membrane for basement and below-ground waterproofing. Made from clear HDPE with 8mm studs, it isolates internal finishes from damp substrates and allows water to drain into a managed system. Supplied in 40m² rolls.

Size

2m x 20m - 40sqm 2.4m x 20m - 48sqm

Product variants

Delivery and Shipping

Place your order before 3pm for next working day delivery.

Please note: Additional delivery charges may apply for Northern Ireland, Isle of Wight, Isle of Man, Isles of Scilly, Scottish Highlands & Islands, and Channel Islands. We will contact you to inform you of any additional costs once your order is received, or you can call us on 0800 111 4898 beforehand to confirm.

Description

Biokil Crown 8mm Membrane – Clear

High-Capacity Cavity Drainage Membrane for Below-Ground Waterproofing

Biokil Crown 8mm Membrane – Clear is a robust, high-capacity cavity drainage membrane designed for internal waterproofing applications in basements, retaining walls, and other below-ground structures. Manufactured from clear high-density polyethylene (HDPE), the membrane features 8mm studs that create an air gap between the substrate and internal finishes, allowing water to drain freely into a perimeter drainage system or sump. The clear construction allows for visual inspection of the substrate during installation, making it ideal for damp-proofing and structural waterproofing.

Key Features & Benefits

8mm Stud Height: Provides excellent drainage capacity for high-moisture or below-ground environments.
Clear HDPE Construction: Enables visibility of substrate for inspection and detailing during installation.
Moisture Isolation: Prevents moisture and salt transfer from masonry to internal finishes.
Compatible with Systems: Works with sump pumps, perimeter channels, and sealing accessories for full cavity drain systems.
Durable & Chemically Resistant: Resistant to alkalis, acids, bacteria, and fungi – ideal for long-term installations.

Product Details

Material: High-Density Polyethylene (HDPE)
Stud Height: 8mm
Thickness: Approx. 0.6–0.7mm
Colour: Clear
Roll Size: Typically 2m x 20m (40m² per roll)
Fixing Centres: 250mm with Biokil Crown Brick Plugs or Newton MultiPlugs
SKU: BC8CLR

Application Instructions

Prepare Substrate: Ensure wall or floor surface is stable and free from sharp projections or loose materials.
Cut & Fit: Trim the membrane to size using a utility knife or shears, ensuring full coverage of the surface.
Fixing: Use appropriate fixing plugs with seals at 250mm centres. Seal around plug heads if required using mastic.
Sealing & Finishing: Overlap sheets by at least one stud column and seal with jointing tape or overtape. Connect to drainage or sump system as specified.

Limitations

Not suitable as a standalone waterproofing system without drainage provision.
Internal finishes should not be applied directly to the membrane without an appropriate air gap or lining system.

Health & Safety

Wear appropriate PPE during handling and installation. Use caution when cutting membrane edges. Refer to the Safety Data Sheet (SDS) for full safety information.