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Wykamol CM20 Cavity Drain Membrane

Posted 15 October 2025
£100.00
Posted by.
Purchased more than what was needed for a basement. So selling approx. 35m2 role. Wykamol CM20 Cavity Drain Membrane – 35m² Roll High-performance waterproofing membrane suitable for basement and below-ground applications. Ideal for creating dry, habitable spaces in areas prone to damp or water ingress. Key Features: High Drainage Capacity: 20mm studded profile provides a water void volume of 14 litres/m², ensuring effective water management. Versatile Application: Suitable for use on walls, floors, vaults, and tunnels, with minimal surface preparation required. BBA Approved: Compliant with BS8102:2022 for Type C waterproofing systems. Durable Construction: Made from high-density polyethylene (HDPE), offering resistance to salts, roots, and contaminants. Easy Installation: Quick to roll out and can be easily cut to size using a sharp blade. Specifications: Dimensions: 2m width x 20m length (total 40m²). Approximately 35m² remaining. Condition: Unused. Price: £100 (negotiable). (I paid £198 +VAT and shipping for CM20 2m x 20m Yellow (HiVis) Ideal For: Basement conversions and cellar waterproofing. Retaining walls and vaulted ceilings. Areas requiring high drainage capacity and reliable waterproofing. Location Garratt Lane, London, Greater London, SW18 4DW what3words
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