Visqueen CM20 Membrane – 2m x 20m x 20mm

Visqueen CM20 Membrane is a 20mm studded cavity membrane formed from 1mm thick high density polyethylene (HDPE). The cavity membrane is black in colour and supplied in rolls, 2m x 20m which includes a 50mm stud free overlap flange along the length of the roll.

Usage

Type C waterproofing is defined in BS 8102:2022 as ‘drained protection’. This is achieved by the incorporation of a drained cavity within the below ground structure. The walls and floor must provide enough primary resistance to water ingress to ensure the cavity only accepts a controlled amount of water or dampness. Water is collected in the cavity, between the external wall/floor and an internal lining (cavity membranes), and diverted to a suitable drainage point.

Visqueen CM20 Membrane is used as an internally applied horizontal membrane as part of a Visqueen cavity membrane and drainage system. However in areas vulnerable to high water ingress, the membrane is suitable for use for both horizontal and vertical substrates.

The membrane system is used for damp proofing and internally waterproofing new or retrofit substructure build projects such as the walls and floors of basements, vaulted ceilings, retaining walls, and tunnels.

The membrane system causes little or no damage to the existing structure making it suitable for heritage buildings and conservation projects.

When used as part of a Visqueen cavity membrane and drainage system, Visqueen CM20 Membrane is suitable for structures requiring Grades 1, 2 or 3 waterproofing protection.

When used as part of a radon protection and extraction system, Visqueen CM20 Membrane will restrict the ingress of radon into buildings.

The Visqueen cavity membrane and drainage system can also be used in conjunction with Visqueen Type A or Type B
waterproofing protection systems where combined protection is required.

Features and benefits

• Suitable for use as part of a Type C waterproofing protection system in accordance with BS 8102:2022
• Compliant with the requirements of NHBC Chapter 5.4 as a
• method of waterproofing protection
  Suitable for heritage buildings and conservation projects – causes little or no damage to the existing structure
• 1mm HDPE membrane – acts as a radon barrier
• Suitable for new and retrofit substructure walls, floors, vaults and tunnels

Approvals and standards

• CE Mark EN 13967:2012+A1:2017
• Suitable for use as part of a Type C (drained) waterproofing protection system to BS 8102:2022
• Visqueen certified with Quality Management System ISO 9001:2015
• Visqueen certified with Occupational Health and Safety System ISO 45001:2018
• Visqueen certified with Environmental Management System ISO 14001:2015