TradeSelect VapourTech Brane VHP

Vapour Permeable Membrane
Trade Select™ VapourTech Brane® VHP is a Very High Permeance (VHP), triple-layer Light* Duty wall wrap, designed for use behind fibre cement and timber cladding in timber and steel framed buildings, and in double brick and brick veneer drained cavity wall systems. When combined with taping of overlaps, Trade Select™ VapourTech Brane® VHP will form an airtight wrap, reducing energy loss from the building envelope.

Classified as High Water Barrier, Low Vapour Barrier, Trade Select™ VapourTech Brane® VHP permits very high levels of condensation absorption and diffusion, allowing water vapour to escape from within the wall structure while restricting the ingress of liquid moisture. Trade Select™ VapourTech Brane® VHP is non-reactive so may be used in conjunction with treated timbers or close to coastlines. It can also be effectively used as an air barrier in unlined areas such as attics.

Product Advantages

  • Translucent
  • Tear resistant
  • Low flammability
  • Non-perforated
  • Easy to install
  • 2.74m width for quicker installation


Residential & Commercial Wall Wrap and Vapour Permeable Membrane for behind fibre cement and timber cladding in most Australian climates.

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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*
R Values
DTE-42172-26 Trade Select™ Brane® VHP
Product Testing

NCC/BCA Compliant
Trade Select™ VapourTech Brane® VHP complies with AS/NZS 4200.1:1994, and therefore meets all the requirements of the National Construction Code and Building Code of Australia for pliable building membranes.


Flammability IndexAS 1530.2-1993Low ≤ 5
Duty RatingAS/NZS 4200.1:1994Light*
Resistance to Water PenetrationAS/NZS 4201.4:1994High
Vapour BarrierASTM E96Low
Water Vapour Transmission Rate1584 g/m2·24hr (23°C, 50% RH)
EmmitanceAS/NZS 4201.5:19940.42
Calculated Reflectance58%
Bushfire Attack Levels
Trade Select™ VapourTech Brane® VHP complies with AS 3959-2009 Construction of buildings in bushfire-prone areas for use in wall systems BAL – LOW to BAL – FZ.





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. Product is manufactured by Ametalin and shall be installed in accordance with AS/NZS 4200.2: 1994 Pliable Building Membranes and Underlays, Part 2: Installation Requirements.

Water Vapour Transmission (WVT): 1584 g/m2•24hr
Vapour Resistance: 0.08 MN•s/g
Vapour Barrier Classification: Low
Water Barrier Classification: High
Duty: Light* in accordance with AS/NZS 4200.1:1994

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.