Description

CM8 Geotextile Membrane 2m x 20m for Drainage and Protection

The CM8 geotextile membrane is a twin-layer drainage and protection system designed for critical waterproofing and ground engineering applications. Measuring 2 metres wide by 20 metres long (40m² total coverage), this membrane combines a robust studded HDPE core with a bonded nonwoven polypropylene geotextile to deliver effective water drainage and long-lasting surface protection.

Ideal for use in basement tanking, retaining walls, green roofs, planters, and podium decks, the CM8 geotextile membrane acts as a cavity drainage layer while filtering out silt and soil to protect waterproofing systems. Its durable stud structure channels water efficiently to drainage outlets, minimising hydrostatic pressure and reducing the risk of structural water ingress.

Key Features

• Two-in-One System: Combines a high-compression HDPE studded drainage sheet with a nonwoven geotextile for filtration and soil protection.

• Excellent Drainage Flow Rate: Channels groundwater and rainwater to drainage outlets, preventing build-up.

• Tough and Durable: Withstands ground movement and pressure without tearing or collapsing.

• Protects Waterproofing: Shields membranes from sharp objects, root penetration and construction damage.

• Easy to Install: Supplied in manageable 2m x 20m rolls for quick layout and fixing to vertical or horizontal surfaces.

 

Applications

• Retaining walls and basement tanking

• Green roofs and landscaped decks

• Podium decks, buried roofs and planter boxes

• External tanking systems for commercial and domestic buildings

 

Specifications

• Size: 2m x 20m (40m² coverage)

• Stud Material: High-density polyethylene (HDPE)

• Geotextile Layer: Bonded nonwoven polypropylene

• Stud Height: 8mm

• Drainage Flow Rate: >2.3 L/m·s

• Compressive Strength: >150 kN/m²

• Weight: Approx. 550g/m²

 

Why Choose Stanley John LTD?

At Stanley John LTD, we supply high-performance drainage and ground protection solutions trusted by professionals across the UK. Whether you’re waterproofing a basement or laying a green roof system, our membranes are built to perform. Explore our full Geotextile Membrane range for more drainage and separation fabrics suited to a wide variety of site conditions.