TradeSelect VapourTech Brane VHP

Vapour Permeable Membrane
Trade Select™ VapourTech Brane® VHP is a Very High Permeance (VHP), vapour permeable, triple-layer, Light Duty wall wrap, designed for use in a wide range of wall systems in both residential and commercial applications.

Trade Select™ VapourTech Brane® VHP is classified as a Water Barrier and Class 4 Vapour Permeable membrane.
Very high levels of water vapour are allowed to absorb and diffuse through the core non-woven structure, ensuring condensation risk is controlled, while outside liquid water cannot penetrate inwards.

Trade Select™ VapourTech Brane® VHP is chemically non-reactive in conjunction with treated timber and salt conditions close to coastlines.

Product Advantages

  • Class 4 Vapour Permeable
  • Water Barrier
  • Triple layer construction
  • Low flammability, suitable for all BALs in bushfire-prone areas


Residential & Commercial Wall Wrap and Vapour Permeable Membrane for a wide range of wall systems.

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Product Details
Product NameTrade Select™ VapourTech Brane® VHP
Roll Size2740 mm x 30 m (82.2m2)
1370 mm x 30 m (41.1m2)
1500 mm x 30 m (45m2)
Duty RatingLight Wall
R Values
Declared Total System R-ValuesWinterSummer
Light Weight Cladding
Fixed to battens with Trade Select™ VapourTech Brane VHP® + R2.7 fibrous batt.
Brick Veneer Wall
With Trade Select™ VapourTech Brane VHP® + R2.7 fibrous Batt
Product Testing

Material Properties and Classifications
Trade Select™ VapourTech Brane® VHP classifications in accordance with AS/NZS 4200.1:2017.


Flammability IndexAS 1530.2-1993Low ≤ 5
Nominal Material Thickness0.38 mm
Duty RatingAS/NZS 4200.1:2017Light Wall
Vapour ControlASTM E96Class 4 Vapour Permeable
Vapour PermeanceASTM E96>1.1403 ug/N.s
Water ControlAS/NZS 4201.4:1994Water Barrier
Resistance to Dry DelaminationAS/NZS 4201.1:1994Pass
Resistance to Wet DelaminationAS/NZS 4201.2:1994Pass
Shrinkage (Repeated wetting & drying)AS/NZS 4201.3:19940.0%
Emittance ValueAS/NZS 4201.5:19940.9, 0.9
Bushfire Attack Levels
Trade Select™ VapourTech Brane® VHP complies with AS 3959-2018 Construction of buildings in bushfire-prone areas for use in all BALs.
Seek independent advice regarding the selection of sarking prior to installation in the BAL design.
Health and Safety
Ametalin has assessed Trade Select™ VapourTech Brane® VHP according to the criteria outlined in the National Occupational Health and Safety Commission (NOHSC):1008 (1998) and NOHSC: 1005 (1999). As a result of the assessment, this product is classified as non-hazardous according to the NOHSC criteria. To reduce risk of UV damage when installing this product, wear protective clothing, safety glasses and sunscreen, and work in the shade wherever practical. Take care when installing Trade Select™ VapourTech Brane® VHP in windy conditions, as the wide width of the product can act as a sail.
Specification Notes
When specifying, state the following:

Product Name: Trade Select™ VapourTech Brane® VHP

The pliable building membrane to be installed shall be Trade Select™ VapourTech Brane® VHP very high permeance wall wrap and shall be installed in accordance with AS/NZS 4200.2:2017 Pliable Building Membranes and Underlays, Part 2: Installation.

Emittance Value: 0.9, 0.9
Emittance Classification: IR Non-Reflective, IR Non-Reflective
Vapour Control Classification: Class 4 Vapour Permeable,>1.1403 µg/N·s
Water Control Classification: Water Barrier
Flammability Index: Low (≤5)
Duty Classification: Light Wall in accordance with AS/NZS 4200.1:2017

Installation Instructions

Trade Select™ VapourTech Brane® VHP should be installed in accordance with AS/NZS 4200.2:1994 Pliable Building Membranes and Underlays, Part 2: Installation Requirements.


Trade Select™ VapourTech Brane® VHP should be installed horizontally as a continuous membrane by fixing to all framing members with the printed side facing out. Trade Select™ VapourTech Brane® VHP should extend from the top plate to the bottom plate on concrete slabs or bearers in timber construction. Fixings should be galvanised clouts or staples for timber construction and tech screws for fastening to steel constructions. In high wind areas, it is recommended to install using non-rip caps on clouts, staples or tech screws. Horizontal, vertical and end overlaps must be 150 mm, with all top layers overlapping the outside of lower layers to prevent water ingress. Stagger any vertical overlaps. Any damage made to Trade Select™ VapourTech Brane® VHP during installation including holes and tears must be repaired. Trade Select™ VapourTech Brane® VHP is not designed to withstand prolonged direct exposure to UV light and the elements. Outer cladding should be installed without delay.