CM3 Mesh Membrane for Plaster Key

Clever Shield CM3 Cavity Drain Mesh Membrane – Type C Waterproofing System

The Clever Shield CM3 Cavity Drain Mesh Membrane is a high-performance waterproofing solution designed to create a Grade 3 dry, habitable environment in line with BS 8102:2009. Featuring a 3mm studded HDPE membrane with integrated mesh lathing, it allows direct plastering or dot-and-dab plasterboard installation, saving time and simplifying finishing.

Ideal for basements, cellars, and damp-affected walls, CM3 provides reliable water management while maintaining the integrity of the structure.

Key Benefits

• ✔ BS 8102:2009 compliant – Suitable for Type C cavity drain systems
• ✔ Direct plaster or dry lining finish – No need for additional preparation
• ✔ Fast installation – Minimal surface prep required
• ✔ No drying time – Decorate immediately after installation
• ✔ Ultra-thin 3mm profile – Maximises internal space
• ✔ Flexible & easy to cut – Fits around windows, doors, and details
• ✔ Waterproof, salt & root resistant – Long-term protection
• ✔ Preserves existing structure – Minimal damage to walls and floors
• ✔ Temperature resistant – Performs in varied site conditions
• ✔ New 1.2m width option – Helps reduce salt banding for a cleaner finish

Ideal Applications

• Basement and cellar waterproofing
• Below-ground structures requiring Type C systems
• Damp or wet walls needing a dry internal finish
• Surfaces requiring direct plastering or plasterboard (dot & dab)
• Refurbishment and retrofit waterproofing projects

Available Sizes & Coverage

• 1m x 10m – 10m² coverage
• 1m x 20m – 20m² coverage
• 1.2m x 20m – 24m² coverage
• 2m x 20m – 40m² coverage

Why Buy From Clever Shield?

✔ Fast UK delivery
✔ Trusted waterproofing specialists
✔ Trade-quality systems that perform on site

FAQs

What is CM3 mesh membrane used for?

It is used for internal waterproofing of walls and floors, especially in basements and damp environments, creating a dry, habitable space.

Can you plaster directly onto this membrane?

Yes, the integrated mesh lathing allows direct plastering or dot-and-dab plasterboard application without additional preparation.

Is CM3 compliant with waterproofing standards?

Yes, it is compliant with BS 8102:2009 and suitable for Type C cavity drain systems.

Does it require drying time before finishing?

No, once installed, you can plaster or finish immediately, saving time on site.

Is it suitable for retrofit projects?

Yes, CM3 is ideal for refurbishment and retrofit waterproofing, as it requires minimal preparation and preserves existing structures.

Method Statement

Method Statement CM3 Cavity Drain Mesh Membrane MSCM01 2018 08

BBA

BBA Certification Clever Shield CM3 Cavity Drain Mesh Membrane 18 5595

Performance

Declaration Of Performance CM3 Cavity Drain Mesh Membrane WPDOP02 2019 08

TDS

Cm3 Mesh Cdm Data Sheet