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Visqueen Gas Barrier NF-400 - Gas, Radon and Damp Proof Membrane

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Visqueen

NF-400 is a co-extruded thermoplastic gas membrane.

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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

Pr_25_57_65_60 Plastics sheetsPrimary

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 guidance

Resistance 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.
Taped: 217 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.

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Sustainability data

Material

Plastic

Literature

NF-400 Gas Barrier – Technical Data Sheet

NF-400 Gas Barrier – Technical Data Sheet

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