CM8 Cavity Drain Membrane

£168.00£208.00

Upgrade your space with the CM8 Cavity Drain Membrane, a durable, 8mm studded membrane perfect for Type C waterproofing applications. Available in both 500g and 700g densities, this membrane quickly transforms damp areas into dry, habitable spaces.

  • Creates dry, habitable living space in areas previously suffering from damp – wet conditions.
  • Waterproof, salt inhibiting, root and contaminate resistant.
  • Quick to install – minimal preparation needed to wall surfaces.
  • Easily cut down using a sharp blade.
  • No drying out process – redecoration can occur immediately.
  • Little or no damage to the existing structure.
  • Low and high temperature tolerance.
  • Part of a type c cavity drain membrane system in line with BS8102:2022.
  • Clear for easy application and fixing of wykamol plugs.
CM8 Cavity Drain Membrane
CM8 Cavity Drain Membrane £168.00£208.00

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CM8 Cavity Drain Membrane: Durable Waterproofing Solution

The CM8 Cavity Drain Membrane is a premium 8mm studded membrane, available in both 500g or 700g densities, suitable for Type C waterproofing applications. It delivers a grade 3 environment in compliance with BS8102:2009 and NHBC Chapter 5.4. The CM8 HD700 is recommended when a heavier, denser membrane is necessary, as advised by the Wykamol Technical Department.

Key Advantages

  • Perfect for use in Type C cavity drain membrane system in line with BS8102:2009.
  • Quick to install with minimal preparation necessary for wall surfaces.
  • Can be easily cut down using a sharp blade.
  • Allows immediate redecoration with no drying out process.
  • Causes little or no damage to existing structures.
  • Tolerates both low and high temperatures.
  • Converts damp/wet conditions into dry, habitable spaces.
  • Waterproof, salt inhibiting, root and contaminate resistant.

Typical Uses

  • Ideal for walls, floors, vaults, tunnels, and both above and below ground level. It can be used in waterproofing applications and damp-proofing applications.

Substrate Preparation

  • Concrete slabs must comply with BS 8204-1:2003+A1:2009 for new construction.
  • Surfaces should be leveled with the help of Wykamol’s Universal Mortar.
  • Walls suffering from mould or masonry fungi should be brushed clean and treated with Microtech Biocide before the membrane is installed.
  • Dry rot in walls necessitates a detailed assessment before application.

Application

  • The membrane is fixed using Wykamol CM Brick Plugs with the studs facing the wall.
  • It’s recommended to apply Wykamol Microsealer to the concrete walls and slab, before applying CM8, to prevent lime efflorescence and dusting.

Finishing and Aftercare

  • The membrane can be finished using a stud frame or dot and dab dry lining methods.
  • CM8 Membrane may be overlaid with closed-cell insulation before laying T&G flooring or can be layered with a conventional 65mm of sand and cement screed.
  • Normal decorating materials can be used as soon as the floor, screed or plaster finishes are dry.

Additional information

Weight N/A
Dimensions N/A
Size: No selection

2.4M X 20M, 2M x 20M

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