Visqueen Gas Barrier NF-500

Visqueen Ultimate Gas Barrier NF-500 is a co-extruded, multi-layer thermoplastic VOC and gas barrier membrane 0.5mm thick (500 micron). The membrane is transparent with a green tint, distinguishing it from the NF-400 (blue tint), and is supplied in single wound rolls measuring 2.4m x 43.5m.

Benefits

• Methane and CO2 protection to BS 8485:2015+A1:2019
• VOC protection to CIRIA C748:2014
• NHBC Foundation NF94 compliant — Type A and Type B membrane locations
• Also acts as radon and damp proof membrane
• BBA Agrement certified

Good to know

• Transparent with green tint
• Store in cool dry place away from direct sunlight
• Lap joints can be taped or heat welded
• The barrier can be positioned above or below reinforced cast in situ concrete floor slabs e.g. ground bearing, suspended or raft, or above precast suspended segmental subfloors, e.g. beam and block floor.
• Visqueen Ultimate Gas Barrier NF-500 should be installed on a smooth continuous surface e.g. grouted beam and block floor, a compacted blinding layer e.g. 50mm thick sand blinding, or smooth concrete blinding. The substrate should be free from irregularities such as loose aggregates or other sharp protrusions, voids, projections or mortar deposits