Wykamol CM20 Cavity Drain Membrane

CM20 Cavity Drain Membrane – High-Capacity Waterproofing Solution

The CM20 Cavity Drain Membrane is a 20mm studded waterproofing membrane, designed for Type C cavity drain systems. Providing a Grade 3 environment in compliance with BS 8102:2009 and NHBC Chapter 5.4, it is the highest drainage capacity membrane in the Wykamol Waterproofing range.

Key Benefits:

✔ Compliant with BS 8102:2009 & NHBC Chapter 5.4 – Meets industry standards for Type C waterproofing.
✔ Superior Drainage Capacity – Provides a high water void volume of 14 litres/m², effectively managing water ingress.
✔ Quick & Easy Installation – Lightweight & flexible, easily rolled out along floors.
✔ Creates a Dry, Habitable Space – Transforms previously damp areas into usable living or storage spaces.
✔ Waterproof, Salt Inhibiting & Contaminant Resistant – Protects against moisture, salts, roots, and pollutants.
✔ Minimal Structural Impact – No significant alteration to existing walls or floors.
✔ Temperature Resistant – Performs in both low and high-temperature conditions.
✔ Durable & High-Grade Material – Ensures long-lasting waterproofing performance.
✔ Easy to Cut & Adjust – Can be trimmed with a sharp blade for precision fitting.

Typical Applications:

✔ Basements & Cellars (walls & floors – creating dry living spaces)
✔ Radon Barrier Protection (approved for radon control)
✔ Waterproofing for Walls, Floors, Vaults & Tunnels
✔ Above & Below Ground-Level Applications (residential & commercial use)

Available Sizes:

📏 2m x 20m & 2m x 10m Rolls (20kg weight option available for easier handling)

The CM20 Cavity Drain Membrane is the ultimate solution for high-capacity water management, ensuring long-term waterproofing for basements, tunnels, and below-ground structures.

Details

BBA

CM20 BBA

BBA Certification Wykamol CM20 Cavity Drain Membrane 18 5595

Performance

Declaration Of Performance CM20 Cavity Drain Membrane WPDOP05 2019 08

TDS

CM20 CDM Data Sheet

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