Damp proof course (DPC) is a horizontal barrier in a wall designed to prevent moisture from rising through the structure by capillary action. It is a critical component in building construction, commonly made of materials such as bituminous felt, plastic, slate, or metal.
A damp-proof course is typically installed at least 150mm above ground level to protect interior spaces from dampness, which can cause structural damage and mould growth.
Features of Damp Proof Course (DPC)
- Prevents rising damp by acting as an effective barrier against moisture travelling upward through walls and foundations.
- High tensile and tear strength, making it durable for use in heavy-duty building applications.
- Resistant to chemicals, salts, and alkalinity, ensuring long-term stability in harsh soil conditions.
- Flexible and easy to install, allowing smooth laying on-site without cracks or deformation.
- Waterproof polymer-based construction, providing superior moisture protection compared to traditional methods.
- Compatible with various building materials such as concrete, brick, blockwork, and stone masonry.
- UV-resistant and rot-proof, it maintains its performance throughout the lifespan of the structure.
- Available in multiple thicknesses and widths, suitable for different architectural requirements.
Areas of Application
- Residential and commercial buildings to prevent rising damp through walls and foundations.
- Basements and ground floors for moisture protection at the structural level.
- Concrete blockwork and brick masonry as a horizontal barrier above footing level.
- Boundary walls and retaining walls to avoid moisture transfer from soil.
- Bathrooms, kitchens, and wet areas for additional damp protection under flooring.
- Load-bearing walls and cavity walls to enhance structural durability.
- Industrial structures require moisture resistance to maintain material strength.
- Renovation and repair works to replace damaged or ineffective DPC layers.



