what is Wykamol CM8 Geotextile Membrane
Wykamol CM8 Geotextile Membrane is a robust, twin‑layered drainage membrane solution combining a studded HDPE cavity membrane and a non‑woven geotextile filter fabric. Designed to relieve water pressure on structures, channel moisture safely to drainage, and protect waterproofing finishes.
Key Features & Benefits
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Dual-layer build: 8 mm studded HDPE membrane paired with a non‑woven geotextile fabric made from UV‑stabilised, virgin polypropylene fibres. The fabric is mechanically entangled to give high strength, loft, abrasion resistance, and then thermally treated to optimise thickness without compromising performance.
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Water drainage & protection: The design ensures water is drained off before it reaches waterproof coatings. Relieves hydrostatic pressure against walls, preventing water build up.
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Filtration layer: The geotextile layer acts as a filter to prevent fine particles (silt, debris) from clogging the drainage core. Keeps drainage performance stable over time. High compressive strength & durability: Rugged construction that withstands back‑fill and ground stresses. Suited for use against external soils, under slabs, retaining walls, etc.
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Versatile use: Works with all types of masonry and construction methods. Also suitable for green roof applications (roof gardens, planted cells, etc.). Easy to handle & install: Supplied in large rolls (e.g. 2 m × 20 m), overlapping joints simply, no heavy equipment needed.
Technical Specifications
| Property |
Specification |
| Stud height / membrane stud depth |
~ 8 mm
|
| Roll size |
2 m × 20 m (covers ~ 40 m²)
|
| Weight per roll |
~ 24.4 kg (for 2×20 m)
|
| Filtration fabric thickness |
~ 0.52 mm for the geotextile layer |
places to apply the Wykamol CM8 Geotextile Membrane
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Basements and cellars (as part of a Type C cavity drainage system)
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Retaining walls and green roofs
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Ground gas protection in accordance with BS 8485
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Horizontal and vertical damp proofing
Dimensions:
Compliant with BS 8102:2022 for waterproofing below ground structures, the Wykamol CM8 Geotextile Membrane is an ideal choice for contractors and specifiers looking for reliable, easy-to-install damp and gas protection in challenging environments.
