Visqueen Gas Barrier NF-400 - Gas, Radon and Damp Proof Membrane
Verified by manufacturer 16 days ago
NF-400 is a co-extruded thermoplastic gas membrane.
Application
Suitable for harmful levels of methane, carbon dioxide and radon ingress prevention applications in gas situations of CS4 and above.
Can be used above or below in situ concrete floor slabs.
Suitable for use as a radon membrane and/ or damp proof membrane.
Not intended for use where there is a risk of hydrostatic pressure.
Description
Visqueen Gas Barrier NF-400 is a co-extruded, multi-layer thermoplastic gas membrane, 0.4 mm thick (400 micron). The membrane is transparent with a blue tint and supplied 2.4 x 43.5 m in a single wound roll.
Features and benefits:
- BDA Agrement Certifcation - third party accreditation.
- Complies with NHBC Foundation’s NF94 guidance for use in Type A membrane locations - non foil system.
- Complies with the methane gas transmission rate, mass per unit area and thickness requirements of BS 8485:2015 + A1:2019 - industry standard for methane and carbon dioxide protection.
- Transparent - allows a clear view of the substrate during and post installation multi-functional - also acts as a radon and damp proof membrane.
- Dual jointing methods - depending on specification, lap joints can be heat welded or taped.
General information
Color | Blue Clear |
Material | Plastic |
Shape | Rectangle Other |
Length | 43500 mm |
Width | 2400 mm |
Height | 0.4 mm |
Uniclass | |
CAWS | J40/35 Loose-laid plastics or rubber gas-retardant membranes J40/30 Loose-laid plastics or rubber sheet oversite damp-proofing J40/20 Loose-laid plastics or rubber sheet damp-proofing J40/297 Waterproofing/ damp-proofing/ gas-retardant membrane J40/140 Loose-laid plastics or rubber sheet gas-retardant membranes J40/130 Loose-laid plastics or rubber sheet oversite damp-proofing J40/120 Loose-laid plastics or rubber sheet damp-proofing |
Specification data - Plastics sheets
Purpose | Gas retardance.Damp-proof membrane. |
Standard | To EN 13697:2012. |
Third-party certification | BDA Agrement Certificate; Suitable for all characteristic Gas Situation (CS) ground gas regimes; Conforms to NHBC Amber 1 and Amber 2 applications; Complies with the methane gas transmission rate, mass per unit area and thickness requirements of BS 8485:2015 + A1:2019; Conforms to the specifcation requirements of BR 211:2023. |
Performance characteristics | |
Tensile strength (minimum) | To BS EN 12311-2, machine direction 26.3 N/mm²; cross direction 29.4 N/mm². |
Tear resistance | To BS EN 12310-1, machine direction 265 N; cross direction 240 N. |
Elongation to break | To BS EN 12311-2, machine direction 607%; cross direction 921%. |
Resistant to underground gases | Radon.Methane.Carbon dioxide. |
Water vapour resistance (minimum) | To BS EN 1931, 2296 MN•s/g. |
Anti-static properties | To BS EN 12730, 15 kg.Manufacturer guidanceResistance to static loading. |
Form | Co-extruded. |
Physical properties | |
Colour | Blue. |
Weight (minimum) | 380 g/m². |
Dimensions | |
Thickness (minimum) | 400 µm. |
Width (minimum) | 2.4 m. |
Roll length (minimum) | 43.5 m. |
Methane transmission rate | To ISO 15105-1, 13.2 ml/m²/day/atm. |
Carbon dioxide transmission rate | To ISO 15105-1, 22 ml/m²/day/atm. |
Radon transmittance | <3.0 x10⁻⁹ m/s. |
Watertightness | To BS EN 1928 (method A), pass. |
Joint strength | Welded: 405 N/50 mm. |
Accessories | Not required. VisqueenPro Double Sided Jointing Tape, 50 mm x 10 m. Visqueen NF-60 Lap Tape, 60 mm x 45 m. Visqueen NF-150 Lap Tape, 150 mm x 10 m. Visqueen NF-Detailing Strip, 300 mm x 10 m. |
Sustainability data
Material | Plastic |
Literature
NF-400 Gas Barrier – Technical Data Sheet
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