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Brick Superstore£99.90Visit shop Siteworx Damp Proof Membrane Maxi Roll 1000G/250Mu - 4M X 25M
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The SITEWORX Damp Proof Membrane is an essential solution for professional contractors and dedicated DIYers looking to prevent ground moisture ingress in construction projects. Boasting BBA approval, this 1000g, 250-micron thick polythene sheet provides robust protection for subfloors, though it requires precise installation techniques and careful handling to avoid tears before the concrete pour.
| Model Part Number | SDP250 |
|---|---|
| Brand | Siteworx |
This product is designed as a damp proof membrane (DPM). Please verify with local building control if specific radon barrier certification is required for your site.
The membrane is 250 microns (1000 gauge) thick.
Overlap the sheets by at least 150mm and seal the seam thoroughly using high-quality damp-proof tape.
No, this is a construction-grade DPM and is not rated or UV-stabilized for use as a pond liner.
A sharp utility knife or heavy-duty scissors are sufficient to cut the polythene.
Patch the area with an extra piece of membrane, ensuring a 150mm overlap and sealing all edges with waterproof tape.
Use heavy objects or specialized site pegs to hold the edges in place until the concrete pour begins.
Before laying the membrane, clear the site of sharp rocks, rubble, or debris that could puncture the 250-micron plastic. Lay the sheet with enough excess to dress up the walls by at least 150mm to connect with the damp-proof course (DPC). To care for the product, keep rolls stored in a dry, shaded area away from direct sunlight, as UV exposure over long periods can degrade the polyethylene. If a tear occurs during installation, repair it immediately with a piece of matching membrane, overlapping the damaged area by at least 150mm on all sides and securing with appropriate jointing tape.
