Trade Grade DPC Roll – 7m Heavy Duty Embossed Damp Proof Course

Heavy Duty Damp Proof Course

The Trade Grade DPC Roll provides a high-performance moisture barrier designed to prevent capillary action in masonry walls. This heavy-duty polyethylene material effectively stops groundwater from rising through foundations into the upper structure. It is essential for maintaining the structural integrity of both residential and commercial buildings by preventing damp-related damage.

Built for the Job

This moisture-proofing solution is engineered for high-pressure environments where masonry meets concrete footings. Site supervisors specify this material for use in brickwork, blockwork, and stone construction to ensure long-term protection against salt attack and timber rot. The roll is flexible enough to handle easily in cold weather while maintaining its puncture resistance on rough site surfaces.

• Installation at the base of external walls to block rising moisture from the ground.

• Placement under wall plates to protect timber framing from damp masonry contact.

• Vertical application around door and window openings to prevent water ingress.

Product Highlights

Superior Mortar Adhesion

The deeply embossed surface pattern provides a mechanical key that ensures the masonry unit remains stable on the mortar bed without slipping.

Chemical & Decay Resistance

• Resists degradation from alkalis present in cement and lime mortars.
• Non-biodegradable composition ensures the barrier does not rot over the life of the building.

Technical Specifications

What’s Included

• 1 x 7-Meter Roll of Heavy Duty Damp Proof Course

On-Site & Workshop Notes

• Ensure the mortar bed is level and free of sharp debris before unrolling the barrier to prevent accidental punctures.

• Standard building codes require a minimum overlap of 100mm at joints to maintain a continuous waterproof seal across the wall length.

• Store rolls vertically in a dry area away from direct sunlight for extended periods to preserve the flexibility of the polyethylene.

• The width of this product should match the wall thickness or extend slightly beyond to ensure full coverage of the masonry bed.