4m x 12.5m x 500mu BBA Black DPM
4m x 12.5m x 500mu BBA Black DPM
Our damp proofing membranes, made from 100% recycled polythene, meet PIFA standards and are BBA accredited.
- Moisture Protection
- Construction Grade
Tree Sisters
Building A Band of Brothers
Product Description
This 500 micron BBA-certified black polyethylene damp-proof membrane (DPM) provides heavy-duty protection against rising damp in ground-floor constructions. At double the thickness of a standard 250 micron DPM, it offers superior puncture resistance on rough sub-bases and hardcore. Compliant with BS 8102 and BBA approved. Supplied in a 4 m × 12.5 m roll (50 m²).
Key Benefits
Application
Lay the membrane over the prepared sub-base or blinding layer with a minimum 300 mm overlap at all joints. Seal overlaps with DPM jointing tape. Turn up at perimeters to lap with the wall DPC. Take care to avoid puncturing — protect with a sand blinding layer if laid directly on hardcore. Can also be used as a slip membrane over insulation before screeding with a 150 mm overlap.
Coverage
Each roll covers 50 m² (4 m × 12.5 m). Allow approximately 10–15% extra for overlaps and wastage depending on floor plan complexity.

£49.80
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Working with our supply chain
For each and every project we work on, we ensure that materials are sourced as close to the site address as possible and attempt to arrange deliveries during off-peak times to minimise congestion on our roads.
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Supporting A Band of Brothers UK
We are proud to support A Band of Brothers UK, a charity helping young men break cycles of violence and crime through mentoring. Every order you place with Screedworks contributes to this vital cause through our easyfundraising partnership.
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Restore & Protect
From January 2021 we are asking our clients to round up their final invoice to the nearest £5, £10 or £20. We will match the amount pledged and then donate the total to Tree Sisters.
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