Polythene – Black 4m x 25m 250 micron

Powerpac Black Polythene 4m x 25m 250 micron is a heavy duty LDPE/LLDPE film used as an under-slab damp-proof membrane and for general site surface protection. Laid between the ground and a concrete slab, it blocks ground moisture from migrating up into the structure. Without it, rising moisture feeds mould and mildew and damages flooring laid over the slab.

When used as a damp-proof membrane, this film is installed in accordance with NZBC Acceptable Solution E2/AS1 clause 10.303. The base must be prepared to NZS 3604:1990 clause E8.2, and installation must be carried out by a Licensed Building Practitioner. The membrane must not be left exposed for more than 28 days before the slab is poured.

Outside of DPM use, the same 250 micron film works as general builders plastic for ground cover and dust screening, where these compliance requirements do not apply. Each roll is 4m wide by 25m long, covering 100m² in a single sheet with fewer joins to tape. Builders and concreters use it across residential and commercial sites in New Zealand.

SKU: 44-BLACKPLAS