Showing all 25 results

Showing all 25 results

CM Cavity Drain Membranes and Waterguard Drainage Systems

The CM Cavity Drainage range provides specialist membranes, fixings, drainage channels and accessories for Type C waterproofing and controlled water-management systems.

At Toner Dampproofing Supplies Ltd, we supply CM cavity drain membranes for contractors, surveyors, builders, waterproofing specialists, property professionals and DIY customers across Northern Ireland and the United Kingdom.

The range is suitable for a wide variety of below-ground waterproofing, basement conversion, cellar refurbishment, damp-management and internal drainage applications. Products are selected according to the structure, water conditions, intended internal finish, drainage route and the overall waterproofing design.

CM products can form part of a professionally designed cavity drainage system where water is managed behind the internal membrane and directed towards suitable drainage, channels, sumps or discharge points.

Shop the CM Cavity Drainage Range

The CM range includes products for membrane installation, water collection, drainage management and internal finishes.

Cavity Drain Membranes

CM cavity drain membranes create a controlled cavity between the structure and the internal finish. This allows moisture or water entering behind the membrane to be managed through the drainage system rather than relying on the internal wall or floor finish alone.

The range includes:

Different membrane profiles, finishes and weights are available for different project requirements.

CM3 Cavity Drain Membrane

CM3 is a low-profile cavity drain membrane for suitable wall and floor applications where a thinner membrane is required.

It may be considered for internal damp-management work, floor applications, wall applications and other specified cavity-drain installations. CM3 is also available in a mesh-faced version where a mechanical key is required for compatible plaster or render finishes.

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CM8 Cavity Drain Membrane

CM8 is an 8 mm studded cavity drain membrane used in a wide range of Type C waterproofing and damp-management applications.

The standard CM8 membrane is suitable for relevant internal wall and floor systems. CM8 Mesh includes a mesh face for compatible plaster finishes, while CM8 HD700 is a denser version intended for projects where the specified membrane requires a heavier-duty option.

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CM20 Cavity Drain Membrane

CM20 is a 20 mm studded cavity drain membrane designed for applications requiring increased drainage capacity.

It is commonly considered for floor applications, basement waterproofing systems and other projects where the waterproofing design requires a higher-capacity cavity behind the membrane. CM20 Hi-Vis provides a high-visibility yellow finish that can assist with safe installation and visual checks in darker basement environments.

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Geotextile Cavity Drain Membranes

CM8 and CM20 Geotextile membranes combine a cavity drain membrane with a geotextile layer.

These products may be used in specified drainage, protection and external waterproofing applications where filtration, water management and protection of the structure are required. The appropriate membrane and system detail should always be selected according to the installation location, drainage design and manufacturer guidance.

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CM Membrane Fixings and Sealing Accessories

Correct fixing and sealing are essential to the long-term performance of a cavity drainage installation.

The CM range includes:

CM plugs are used to secure suitable membranes to the substrate. The correct fixing type depends on the membrane, wall construction, proposed finish and installation detail.

Plug seals, profile strips and compatible sealing products help installers form a neat and controlled membrane system around fixings, junctions and finishing details.

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Waterguard Perimeter Drainage Channels and Accessories

A cavity drain membrane system needs a planned route for water collection and drainage.

Waterguard components are designed to help collect water from behind cavity drain membranes and direct it towards a suitable outlet, sump chamber, pump system or drainage route. Access for inspection and maintenance should always be considered at the design stage.

The Waterguard range includes:

These components allow a drainage route to be formed around room perimeters, across floor areas and through suitable outlet points. Jetting-eye access can support future inspection and maintenance where it is included within the waterproofing design.

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Choosing the Right CM Membrane

Selecting the right cavity drain membrane depends on the project, the structure and the intended internal finish.

Choose CM3 Where a Low-Profile Membrane Is Required

CM3 may be suitable where a slimmer cavity-drain profile is needed for specified wall or floor applications.

Choose CM8 for General Cavity Drainage Applications

CM8 is commonly used for cavity drainage on internal walls and floors. The appropriate finish, fixing detail and drainage arrangement should be planned before installation.

Choose CM8 Mesh or CM3 Mesh for Compatible Plaster Finishes

Mesh-faced membranes are intended to provide a mechanical key for compatible plaster or render systems. Always confirm the finish system, preparation requirements and manufacturer guidance before installation.

Choose CM8 HD700 Where a Heavier-Duty Membrane Is Specified

CM8 HD700 may be appropriate where the waterproofing specification requires a denser membrane. Product selection should be based on the project design and anticipated loading requirements.

Choose CM20 for Higher-Capacity Floor Drainage Applications

CM20 may be suitable for floor installations and other cavity-drain designs where increased drainage capacity is required.

Choose Geotextile Membranes for Specified Drainage and Protection Details

CM8 and CM20 Geotextile membranes may be appropriate where the waterproofing design requires filtration, drainage and protection within the same system detail.

Important Type C Waterproofing Considerations

Cavity drainage is a water-management approach. It does not rely on stopping every drop of water at the structure; instead, it creates a controlled drainage cavity and directs water towards a suitable collection and discharge route.

A complete Type C waterproofing system may include:

  • Suitable cavity drain membranes.
  • Correct membrane fixings and seals.
  • Perimeter or floor drainage channels where required.
  • Accessible maintenance and jetting points.
  • Sump chambers and pumps where gravity drainage is not possible.
  • A suitable discharge route.
  • Appropriate wall, floor and ceiling finishes.
  • A maintenance plan for pumps, channels and drainage access points.

For basement conversions, habitable spaces, complex structures, high water-risk sites or projects where failure would have significant consequences, seek advice from a qualified waterproofing design specialist before ordering materials.

Technical Support for CM Cavity Drainage Systems

Toner Dampproofing Supplies Ltd supports projects involving basement waterproofing, cellar conversions, internal damp management, cavity drainage systems and pumped water management.

Our Technical Team can help you identify suitable CM products, explain membrane options, discuss Waterguard drainage-channel components and guide you towards relevant technical information.

To help us provide useful advice, please send:

  • Photos of the area to be waterproofed.
  • Wall and floor construction details.
  • Whether the project is above or below ground.
  • Approximate room dimensions.
  • Details of any existing drainage, sump or pump system.
  • The intended internal wall and floor finish.
  • Any survey, design or specification already available.

Contact Our Technical Team