CM20 Geotextile Membrane – High-Performance Drainage & Radon Barrier
The CM20 Geotextile Membrane is a premium dual-layer system combining a 20mm studded HDPE membrane with a high-strength, nonwoven polypropylene geotextile layer. Designed for superior drainage, protection, and gas resistance, it is ideal for demanding waterproofing and construction applications.
Engineered for performance, this membrane delivers high compressive strength, excellent filtration, and long-term durability in both above and below-ground environments.
Key Benefits
- ✔ Effective radon barrier – Tested for protection against harmful ground gases
- ✔ High drainage capacity – Channels water away quickly and efficiently
- ✔ Durable & UV stabilised – Built to withstand harsh site conditions
- ✔ Integrated filtration layer – Prevents clogging and silting
- ✔ Improves insulation performance in roof and wall systems
- ✔ Easy to install – Lightweight, flexible and installer-friendly
- ✔ Versatile use across multiple construction applications
Typical Applications
- Radon gas protection systems
- Green roof and roof garden installations
- Basement waterproofing and protection
- Retaining walls and below-ground structures
- Drainage and protection board applications
- Backfilling and excavation projects
Product Specifications
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Product Code: CM20GEOTEXT
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Roll Size: 2m x 20m
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Coverage: 40m²
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Weight: 40 kg
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Material: HDPE studded membrane with bonded geotextile layer
Storage:
Store upright, under cover, away from heat and direct sunlight.
Why Choose Clever Shield?
At Clever Shield, we supply high-performance waterproofing and drainage solutions trusted by professionals across the UK. With fast delivery and expert support, we help you get the job done right first time.
FAQs
What is the purpose of the geotextile layer?
The geotextile layer acts as a filtration barrier, preventing soil and debris from clogging the drainage channels while allowing water to pass through.
Is CM20 suitable for radon protection?
Yes, CM20 has been tested for radon resistance, making it suitable for use as part of a radon protection system.
Can this membrane be used for green roofs?
Yes, it is ideal for green roof systems, providing both drainage and protection for planting layers and substrates.
Is it suitable for below-ground waterproofing?
Absolutely. CM20 is widely used in basement and retaining wall applications to protect waterproofing systems and manage water ingress.
How easy is it to install?
The membrane is lightweight, flexible, and quick to install, reducing labour time and simplifying handling on site.
