Damp Proof Membrane (DPM)

Learn more about damp proof membrane

A damp proof membrane is an essential component in modern construction, acting as an impermeable layer to block moisture from rising through floors and walls. When installed correctly, it prevents groundwater from saturating internal building materials, significantly reducing the risk of damp, mould, and timber decay. Using high-quality, durable membranes ensures long-term protection, giving you and your clients peace of mind.

Typical uses

• DPMs are primarily used in ground-bearing concrete floors to isolate the structure from soil moisture. 

• They are also vital for basement waterproofing, cavity drainage systems, and as a protective layer during screeding or flooring installations. 

• Additionally, they are used in wall-lining applications to prevent moisture transmission in areas prone to dampness.

How to choose the right damp proof membrane

When selecting a membrane, consider the substrate, the level of moisture protection required, and local site conditions. The thickness of the membrane, measured in microns (mu), is a key factor; higher micron ratings typically offer increased resistance to punctures during the construction process. Always ensure the material is compatible with your intended surface, and look for products that comply with current UK building regulations.

Before you order

Before placing your order, accurately calculate the total surface area you need to cover and factor in a percentage for overlaps and wastage. Ensure you have the correct accessories, such as double-sided butyl tape or sealing compounds, to guarantee the integrity of your joints. If you are unsure about the specific requirements for your site, our branch experts are on hand to provide guidance.

Explore our range of damp proof membrane

Protecting your build from moisture ingress is critical to structural longevity. Our range of damp proof membranes provides a robust, moisture-resistant barrier designed to safeguard your projects against rising damp and ground moisture. Whether you are installing a new concrete slab or undertaking a remedial basement project, choosing the right DPM is the first line of defence against structural decay and interior damage.

We stock high-performance membranes, including multi-purpose tanking membranes and specialist liquid systems, ensuring you have the right solution for any substrate. Our selection is engineered for durability, helping you meet building regulations and maintain high standards on-site. Explore our damp proof course and building chemicals sections to ensure you have all the necessary components to complete your installation effectively. Browse our collection below to find the ideal material for your next job.