🎄 Christmas Dispatch Notice
Please note that Clever Shield will be closed for the Christmas period starting from Friday 19 December 2025.
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Last dispatch before Christmas:
• Wykamol products: Friday 19 December, 11AM
• Newton products: Monday 22 December, 2PM
• All other products: Thursday 18 December, 1PM - Orders placed during the Christmas closure will be dispatched from Friday 2 January 2026.
To avoid delays, we recommend placing your orders as early as possible.
Thank you for your continued support. We wish you a Merry Christmas and a Happy New Year!
Description
Wykamol CM20 Geotextile Membrane – High-Capacity Drainage (Pallet Rate)
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, combined with a non-woven geotextile filter, efficiently channels water away from structures while preventing soil ingress. Ideal for external basement waterproofing, podium decks, retaining walls, and green roofs, the membrane is available at pallet rate pricing for bulk purchases, offering significant cost savings on large-scale projects.

Key Features & Benefits:
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Superior Drainage Capacity: The deep 20mm studs provide a high flow rate, effectively managing groundwater and ensuring optimal drainage performance.
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Geotextile Filtration: The integrated non-woven geotextile prevents soil and debris from clogging the drainage system, ensuring long-term effectiveness.
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Robust HDPE Construction: Resistant to chemicals, root penetration, and structural movement, ensuring the membrane lasts in demanding conditions.
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External Waterproofing Compatibility: Works seamlessly with Wykamol HydroTank coatings and other external waterproofing systems.
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Quick & Easy Installation: The membrane is lightweight, durable, and easy to cut and shape, allowing for fast and flexible installation.
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Multi-Purpose Application: Suitable for retaining walls, podium decks, earth-covered structures, car parks, and basements, providing versatile drainage solutions.
Ideal Applications:
The Wykamol CM20 Geotextile Membrane is perfect for external waterproofing and drainage in various applications:
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External Waterproofing: Protects structures from hydrostatic pressure and water ingress, ensuring reliable waterproofing for underground and below-ground structures.
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Podium Decks & Green Roofs: Provides high-capacity drainage beneath landscaping, managing water buildup effectively.
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Retaining Walls & Earth-Sheltered Buildings: Acts as a drainage layer to prevent water buildup and safeguard structures from moisture damage.
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Radon Barrier Protection: Certified protection against harmful ground gases, providing additional safety for your building.
Installation Process:
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Prepare the Surface: Ensure the surface is clean, dry, and stable for optimal performance.
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Position the Membrane: Roll out the CM20 Geotextile Membrane with the geotextile side facing outward.
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Secure the Membrane: Fix using Wykamol Brick Plugs, spaced at 500mm intervals for secure attachment.
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Install Drainage System: Use Wykamol Drainage Channels or land drains to effectively redirect water away from the structure.
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Backfilling: Fill with coarse gravel to enhance drainage performance and ensure proper water management.
Product Specifications:
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Size: 2m x 10m
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Weight: 40kg
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Coverage: 20m² per roll
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Product Code: CM20GEOTEXT
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Storage: Store upright, under cover, away from high temperatures and open flames to maintain membrane quality.
Bulk Pallet Rate Savings:
The Wykamol CM20 Geotextile Membrane is available at pallet rate pricing for bulk purchases, offering significant cost savings for large-scale projects. This is the perfect solution for contractors, developers, and other large builds, enabling you to manage costs while ensuring high-performance waterproofing and drainage. Contact us today for more details on pallet pricing and bulk order options.
Why Choose Wykamol CM20 Geotextile Membrane?
The Wykamol CM20 Geotextile Membrane offers superior drainage and waterproofing capabilities for external applications such as basements, podium decks, and retaining walls. With its durable construction, easy installation, and long-lasting performance, it’s an ideal solution for large projects requiring reliable water management. Take advantage of pallet rate pricing to get cost-effective, high-quality drainage protection for your building.
Downloads
- 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
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