Damp Proof Course & Membrane

A damp proof course is essential for protecting your building from rising moisture, which can cause structural damage, mould growth, and deterioration of internal finishes. DPC membrane creates a reliable barrier within walls, preventing ground moisture from travelling upwards through masonry and compromising the integrity of your construction.

Our DPC Membrane Selection

McMahons stocks high-performance damp proofing solutions suitable for new builds, extensions, and remedial work.

• Polyethylene DPC rolls in various widths to suit different wall thicknesses, from standard 100mm cavity walls to solid masonry construction
• Heavy-duty membranes with excellent tear resistance for demanding site conditions and rough masonry surfaces
• Flexible materials that maintain their integrity around corners and at junctions without cracking or splitting
• Building regulation compliant products meeting Irish and UK standards for moisture resistance

For your complete masonry project, browse our full Bricks & Blocks range, including Block products for your walling requirements.

Selecting the correct membrane depends on your wall type and application point. Standard 450mm width suits most residential ground floor installations, while wider rolls work better for retaining walls and below-ground applications. Consider thickness and flexibility when working with uneven surfaces or complex junctions where the material needs to conform without puncturing.

Why Choose McMahons for Your Damp Proofing Materials?

With over 190 years serving Irish builders, our team understands the moisture challenges unique to our climate. Our staff can advise on correct installation heights, lapping requirements, and compatibility with other building components to ensure your damp proof course performs as intended for decades. Ready to protect your build? View our delivery options and get your materials on site when you need them.