Trade Grade Damp Proof Membrane 1000 Gauge 4m x 25m

1000-Gauge DPM Roll

The Trade Grade Damp Proof Membrane 1000 Gauge 4m x 25m provides a high-performance moisture barrier for ground-bearing concrete floors. This 250-micron polyethylene sheet prevents capillary action and rising damp in residential and commercial foundations. It meets standard building regulations for sub-floor protection and serves as a reliable isolation layer between the ground and the building structure.

Built for the Job

Site supervisors specify this heavy-duty barrier to protect the integrity of concrete slabs. It is typically installed over a sand-blinded hardcore bed to prevent punctures from sharp aggregates. The material is engineered to withstand the rigors of a busy job site, including foot traffic during the installation of steel reinforcement and the subsequent concrete pour. Its flexibility allows for easy detailing around corners and penetrations, ensuring a continuous seal across the entire footprint of the build.

• Basement and foundation waterproofing for new builds.

• Temporary weather protection for sensitive site materials and timber.

• Moisture isolation under screeded floors in renovation projects.

Product Highlights

Material Integrity

The low-density polyethylene construction ensures long-term chemical resistance against common soil-borne contaminants.

Site Durability

• Consistent 250-micron thickness for uniform protection.
• High tear and burst resistance during the pouring phase.

Technical Specifications

What’s Included

• 1 x 100m² Roll (4m x 25m folded to 1m width for transport)

On-Site & Workshop Notes

• Ensure a minimum overlap of 150mm at all joints to maintain barrier continuity.

• Seal all laps and pipe entries using double-sided butyl tape and reinforced jointing tape.

• Store rolls upright on a flat, dry surface and keep away from direct sunlight for extended periods.

• Inspect the surface for damage before the pour and patch any tears with a dedicated repair kit.