Mapei (UK) Limited. Wykamol Waterproofing System. Wykamol CM3 Cavity Drain Membrane. Product Sheet 1

Certificate 25/7462

British Board of Agrément, 2025
Mapei (UK) Limited. Wykamol Waterproofing System. Wykamol CM3 Cavity Drain Membrane. Product Sheet 1 Download document

Document Status

Current

Supplement

Core Supplement

Series

Certificate

Abstract

Relates to Wykamol CM3 Cavity Drain Membrane, a high-density polyethylene (HDPE) membrane for damp-proofing walls, floors and ceilings in new construction or in existing buildings. It can be used above or below ground, over a contaminated or damp background, to support a dry lining or flooring. 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

  • Waterproofing/damp proofing
  • Coverings and surface finishes

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.

Information

NBS

NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.

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We connect trusted knowledge to customers' workflows – mitigating risk, increasing efficiency and accelerating innovation For more than 60 years, leading R&D and engineering-intensive organizations have relied on us to achieve on-time, on-budget delivery of complex projects and new products. We deliver an unparalleled combination of technical content and Artificial Intelligence (AI) technologies to surface answers from the vast universe of technical knowledge, both inside and outside the organization. In a single interface, we connect the dots between information scattered across many different sources, allowing technical professionals to make better, more informed decisions faster.