CM20 Cavity Drain Membrane
CM20 Cavity Drain Membrane

CM20 Cavity Drain Membrane

  • Part of a type C cavity drain membrane system in line with BS8102:2009.
  • Gives a high water void volume of 14 litres/m2.
  • Quick to install – easy to roll out along floors.
  • Creates a dry, habitable living space in areas previously suffering from damp or wet conditions.
  • Easily cut down using a sharp blade.
  • Waterproof, salt inhibiting, root and contaminate resistant.
  • Little or no damage to the existing structure.
  • Low and high temperature tolerance.
  • High grade material.
  • Available in rolls of 2m x 20m and 2m x 10m* (*only 20 kg in weight)

Free worldwide shipping on all orders over £850

  • 30 days easy returns
  • Order yours before 11.59 am for same day dispatch

The CM20 Cavity Drain Membrane is a 20mm studded membrane, suitable for Type C waterproofing and delivering a grade 3 environment to BS8102:2009 and NHBC Chapter 5.4. CM20 is the highest drainage capacity membrane in the Wykamol Waterproofing range.

Wykamol CM20 Waterproofing Membrane is BBA-approved as suitable for type ‘C’ Cavity Drain Membrane Systems in accordance with BS8102 and now includes our high-vis yellow membrane.

This waterproofing membrane is the highest drainage capacity membrane in the CM range, giving a void of 14 litres/m². Suitable for use on floors and walls in very wet situations, or where a large stud height is needed to maximise insulation values.

This membrane is available in 2 m width as 20 m rolls or 10 m rolls, the latter being light enough for individual manual handling.

CM20 creates a dry, habitable living space in areas previously suffering from damp or wet conditions.

Additional information

Weight 42 kg
Dimensions 200 × 42 × 200 cm