CM8 Cavity Drain Mesh Waterproofing Membrane

CM8 Cavity Drain Mesh Membrane: The Choice for Basement and Cellar Conversions

The CM8 Cavity Drain Mesh Membrane is a highly adaptable 8 mm studded membrane that features a robust HDPE mesh lathing welded to the front face. This allows for the direct application of various plaster finishes, adhesive ‘dabs’, and plasterboards. Delivering a grade 3 or 4 environment, this membrane is in line with BS8102:2009 and NHBC Chapter 5.4 standards.

Key Advantages

• CM8 Cavity Drain Mesh Membrane forms part of a Type C cavity drain membrane system, as per BS8102:2009.
• Quick and easy to install, with minimal preparation required.
• Can be easily cut and folded around windows and doors.
• Allows for immediate redecoration with no drying out process.
• Causes little to no damage to existing structures.
• Waterproof, salt inhibiting, root and contaminate resistant.
• Transforms damp areas into dry, habitable spaces.

Typical Uses

• Above and below ground level, waterproofing applications, and damp-proofing applications.

Substrate Preparation

• Existing plaster, render or screed should be removed to level surfaces, preferably with Wykamol’s Universal Mortar.
• Walls suffering from mould or masonry fungi should be brushed clean and treated with Microtech Biocide before the membrane is installed.
• Dry rot in walls necessitates a detailed assessment before application.

Application

• Fixing requires Wykamol CM Plaster Plugs, with the studs facing the wall.
• In above-ground applications, the membranes should be sealed by butt jointing and oversealing with Wykamol Fibre Tape.

Finishing and Aftercare

• The membrane can be finished using standard plastering techniques or dry-lining.
• Normal decorating materials can be used as soon as the floor, screed or plaster finishes are dry.
• A mechanical ventilation system is recommended for areas that lack natural ventilation to control condensation.