Document Status
Current
Supplement
Core Supplement
Series
Certificate
Abstract
Relates to Wykamol CM3 Cavity Drain Mesh Membrane, a translucent high-density polyethylene (HDPE) membrane incorporating a polypropylene mesh as a key for plaster, render or dry lining on plaster dabs for damp-proofing walls and ceilings in new construction or existing buildings. The system can be used above or below ground, over a contaminated or damp background, to support a dry lining. It can also be used externally as a waterproof support for render. Key factors assessed were mechanical resistance and stability, safety in case of fire, hygiene, health and the environment, safety and accessibility in use, protection against noise, energy economy and heat retention, sustainable use of natural resources, and durability.
History
Date of Issue: 26 September 2025. Supersedes Certificate no. 18/5595
Subjects
- Coverings and surface finishes
- Waterproofing/damp proofing
Publisher History
The British Board of Agrément have been providing authoritative and independent information on the performance of building products for over 40 years. The certificates they produce contain data on durability, installation and compliance with Building Regulations.