A 4 x 25m roll of 1200 gauge black polythene damp proof membrane (DPM) with BBA approval is a heavy-duty building material designed to prevent moisture and water vapor from rising through concrete ground floors into a structure.
Installation involves rolling out the membrane over a well-compacted hardcore and blinding layer, overlapping joints by at least 150mm, and securely sealing them with double-sided DPM tape to create a continuous, impermeable barrier that integrates smoothly with the wall's damp-proof course (DPC).
 
It is ideal for new builds, extensions, and flooring renovation projects where concrete floor slabs are being poured, ensuring long-term protection against dampness and ground moisture in domestic and commercial construction.
 
Product attributes
Length: 25 m
Thickness: 0.25 mm
Width: 4000 mm
Colour: Black
Coverage: 100 m2
Type: Damp Proof Membrane
 
Features & benefits
A low-density polyethylene damp-proof membrane for use in concrete floors with BBA accreditation
Use in solid concrete ground floors, not subject to hydrostatic pressure, to protect against rising water and damp
Comprehensive range to satisfy most domestic and low rise buildings
Accredited by the British Board of Agrement (BS EN 13967: 2012)
Made in the UK from recycled polythene
Waterproof & Rotproof