Wykamol CM3 Cavity Drain Mesh Membrane is a high‑performance waterproofing solution designed for use in Type C cavity drain systems, in accordance with BS 8102:2022. Manufactured from tough, studded high‑density polyethylene (HDPE), this 3mm membrane features a welded polypropylene mesh on its face, allowing for direct application of plaster finishes, adhesive dabs, or dot‑and‑dab plasterboard systems. It delivers a Grade 3 internal environment, making it ideal for basements, cellars, and other below‑ground structures requiring reliable damp control.
Engineered for versatility and durability, is suitable for both above‑ and below‑ground applications. Its studded profile creates an air gap between the substrate and the internal finish, promoting ventilation and helping manage moisture. The membrane is tough yet pliable, easily cut to size with a sharp blade, and quick to install using standard fixings and sealing accessories.
Whether used in new construction or refurbishment projects, provides a robust barrier against water ingress while supporting a wide range of internal finishes. It’s an essential component in modern damp‑proofing strategies, offering long‑term protection and flexibility for installers and specifiers.
20m long, 1.2 m wide.
Can be bought by the metre (£7 per m).
Key Benefits
- 3mm studded HDPE membrane with welded mesh for direct plastering or boarding
- Compatible with Type C cavity drain systems under BS 8102:2022
- Delivers Grade 3 internal environment for habitable spaces
- Suitable for above‑ and below‑ground use including basements and cellars
- Tough, flexible, and easy to cut for fast installation
- Supports dot‑and‑dab, plaster, or render finishes
