Description
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
| Product Description | CM20 Waterproofing Membrane, Black | CM20 Waterproofing Membrane, Black |
| Product Code | CM202X20 | CM202X10 |
| Packing and Size | 2 m x 20 m | 2 m x 10 m |
| Coverage | 40 m² | 20 m² |
| Storage | Store in an upright position, under cover and away from high temperatures and open flames | Store in an upright position, under cover and away from high temperatures and open flames |
| Life Expectancy | Lifetime of Structure | Lifetime of Structure |
BBA
BBA Certification Wykamol CM20 Cavity Drain Membrane 18 5595
Performance
Declaration Of Performance CM20 Cavity Drain Membrane WPDOP05 2019 08
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