Wykamol CM20 Geotextile Membrane 2m x 10m

Wykamol CM20 Geotextile Membrane – High-Capacity Drainage & Protection

The Wykamol CM20 Geotextile Membrane is a heavy-duty, cavity drainage membrane designed for high-water-volume applications. Featuring a 20mm stud profile, this advanced HDPE membrane with a non-woven geotextile filter effectively channels water away from structures while preventing soil ingress. It is ideal for external basement waterproofing, podium decks, retaining walls, and green roofs.

Key Features & Benefits

✔ Superior Drainage Capacity – The deep 20mm studs provide a high flow rate, ensuring effective groundwater management.
✔ Geotextile Filtration – The integrated non-woven geotextile prevents soil and debris from clogging the drainage system.
✔ Robust HDPE Construction – Resistant to chemicals, root penetration, and structural movement.
✔ External Waterproofing Compatibility – Works with Wykamol HydroTank coatings and other external waterproofing systems.
✔ Quick & Easy Installation – Lightweight yet durable, cut and shape to fit any surface.
✔ Multi-Purpose Application – Ideal for retaining walls, podium decks, earth-covered structures, car parks, and basements.

Typical Applications

• External Waterproofing – Protects structures from hydrostatic pressure and water ingress.
• Podium Decks & Green Roofs – Provides high-capacity drainage beneath landscaping.
• Retaining Walls & Earth-Sheltered Buildings – Acts as a drainage layer to prevent water buildup.
• Radon Barrier – Certified protection against harmful ground gases.

Installation Process

1️⃣ Prepare the Surface – Ensure it is clean, dry, and stable.
2️⃣ Position the Membrane – Roll out CM20 Geotextile Membrane with the geotextile side facing outward.
3️⃣ Secure the Membrane – Fix with Wykamol Brick Plugs, spacing at 500mm intervals.
4️⃣ Install Drainage System – Use Wykamol Drainage Channels or land drains to redirect water.
5️⃣ Backfilling – Fill with coarse gravel to enhance drainage performance.

Product Specifications

• CM8-GEOTEXTILE-BWM06-TDS8.pdf
• CM20-GEOTEXTILE-CDM-BWM07-TDS7.pdf
• CM8-Geotextile-BBA-Cert-2022-05.pdf
• CM20-Geotextile-BBA-Cert-2022-05.pdf
• CM8GEOTEXT-DECLARATION-OF-PERFORMANCE-WPDOP073.pdf
• CM8GEOTEXT-DECLARATION-OF-CONFORMITY-WPDOC073.pdf
• CM20GEOTEXT-DECLARATION-OF-CONFORMITY-WPDOC083.pdf
• CM20GEOTEXT-DECLARATION-OF-PERFORMANCE-WPDOC083.pdf
  

Always follow an up to date data sheet when installing or applying this or associated products.

For help and advice on product purchase or application please call our customer services team on 01268 472358.

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