Description
Wykamol CM20 Cavity Drain Membrane 2m x 20m Yellow (Hi-Vis)
Available in other variants - View all CM20 Membrane Products
Wykamol CM20 is a 20mm studded cavity drain membrane designed for use within Type C waterproofing systems. Providing the highest drainage capacity within the Wykamol cavity drain membrane range, CM20 is suitable for basement waterproofing, below-ground structures and projects requiring effective water management. The high-visibility yellow finish assists installation and inspection, while the membrane's drainage capacity helps create dry internal environments in accordance with BS 8102:2009 waterproofing principles.
Key Features & Benefits
- 20mm studded cavity drain membrane
- High-visibility yellow finish
- Designed for Type C cavity drain waterproofing systems
- Complies with BS 8102:2009 waterproofing principles
- Suitable for projects following NHBC Chapter 5.4 guidance
- High drainage capacity
- Water void volume of 14 litres/m²
- Suitable for creating Grade 3 internal environments when correctly designed and installed
- Lightweight and flexible for easier installation
- Waterproof construction
- Resistant to salts commonly found in below-ground structures
- Resistant to roots and contaminants
- Suitable for above and below ground applications
- Can be cut and trimmed on site
- Minimal impact on existing structures
- BBA Certified
- Designed for the lifetime of the structure
Suitable Applications
- Basement waterproofing systems
- Cellar waterproofing
- Waterproofing below-ground structures
- Floor waterproofing systems
- Wall waterproofing systems
- Vault waterproofing
- Tunnel waterproofing
- Type C cavity drain systems
- Radon protection systems
- Residential waterproofing projects
- Commercial waterproofing projects
- Refurbishment and conversion projects
Technical Information
- Product Type: Cavity drain membrane
- Membrane Stud Height: 20mm
- Roll Size: 2m x 20m
- Coverage: 40m²
- Colour: Yellow (High Visibility)
- Water Void Capacity: 14 litres/m²
- Waterproofing Type: Type C cavity drain system
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Compliance:
- BS 8102:2009
- NHBC Chapter 5.4
- BBA Certificate: 18/5595
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Storage:
- Store upright
- Keep under cover
- Protect from high temperatures
- Keep away from open flames
- Life Expectancy: Lifetime of structure
Frequently Asked Questions
What is Wykamol CM20 used for?
CM20 is designed for Type C cavity drain waterproofing systems where high drainage capacity is required for managing water ingress in below-ground structures.
What makes CM20 different from standard cavity drain membranes?
CM20 features 20mm studs and provides a water void volume of 14 litres/m², offering one of the highest drainage capacities within the Wykamol waterproofing range.
Can CM20 be used for basement conversions?
Yes. CM20 is commonly used in basement and cellar waterproofing systems designed to create dry, usable internal spaces.
Is CM20 suitable for radon protection projects?
Yes. The manufacturer states that the membrane is suitable for radon barrier applications.
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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