Damp-proof Membrane

Compare damp-proof membranes for your prepared base, with moisture readings and the chosen floor system checked by your fitter before you select a product. Compare related flooring accessories with the exact product details to hand before you choose the material for this part of your room.

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Ardex DPM 1 C One Coat 10 kg

Underfloor heating

£255.98

~~£308.40~~

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About Damp-proof Membrane

Damp-proof Membrane is part of the preparation below a finished floor where a suitable moisture-control system is required; the membrane has a defined role between the base and the layers above, with its performance tied to the conditions stated by the maker.

You do not choose this material for the appearance of the room; its purpose relates to moisture within the floor build and the requirements of the chosen covering. The visible floor can have a different design while relying on the same type of preparation beneath it.

The membrane’s stated limits relate to specific test methods and conditions, which are part of its technical information; you may see different figures for different products without those figures being interchangeable. The relevant floor system connects that moisture data with the base and the requirements of the covering that will sit above it.

You can browse flooring accessories within our wider flooring selection.

What is a damp-proof membrane

A damp-proof membrane is a moisture-control layer within a floor build. Surface-applied products are used on suitable bases where the chosen system permits them, with stated limits for the conditions they can tolerate. They are different from the decorative floor covering you see in the room.

You may come across liquid-applied membranes in floor preparation work. Their role is to control the passage of moisture within an approved system. The exact product determines the permitted base and the materials that can sit above the treated surface.

Moisture beneath a finished floor

A floor base can contain moisture even when its surface looks dry; that matters because adhesives and floor coverings have their own limits for the conditions beneath them. A moisture-control product has a defined place where the recorded conditions and the proposed floor build call for it.

The visible floor does not establish the state of the base below; a vinyl finish and a wood floor may each have different requirements for the same room. The relevant measurements belong to the base, while the chosen membrane has its own published performance limits.

You can also find floor smoothing compounds and primers among the related products across the Flooring King catalogue.

Membranes within a preparation system

A surface membrane is often one part of a sequence that also includes a smoothing layer or primer; the products need to be compatible because each layer becomes the surface for the next. Manufacturers describe those pairings within their system information.

A membrane does not level an uneven floor or replace structural repairs; its purpose is moisture control within the conditions stated for the product. The finished room may look the same with different preparation beneath it, but the hidden layers have distinct roles in supporting the chosen floor covering.

Product forms and coverage

Different membrane products have their own mixing and application requirements, with coverage tied to the stated coat thickness and surface conditions; the amount in a pack is therefore only part of the quantity information. The required system determines how that material is used.

The time before another layer can be applied also varies by formulation and room conditions. These are product-specific details, rather than a single rule for every damp-proof membrane. You can find them on the relevant technical sheet. The chosen product remains part of the floor beneath the finish.