TradeSelect VapourTech Wall

Vapour Permeable Air Barrier Membrane
Trade Select™ VapourTech® Wall is classified as Air Barrier, Water Barrier and Class 4 Vapour Permeable. Very high levels of water vapour are allowed to absorb and diffuse through the core non-woven structure, ensuring that condensation risk is controlled, while outside liquid water cannot penetrate inwards. Trade Select™ VapourTech® Wall is chemically non-reactive in conjunction with treated timber and salt conditions close to coastlines.

Product Advantages

  • Class 4 Vapour Permeable
  • Advanced water, air and vapour control membrane
  • Triple layer construction for durability
  • Low Flammability, suitable for all BALs in bushfire-prone areas
  • High strength and puncture resistant


Trade Select™ VapourTech® Wall is a 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™ Wall
Roll Size1500 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® Wall + R2.7 fibrous batt.
Brick Veneer Wall
With Trade Select™ VapourTech® Wall + R2.7 fibrous Batt
Product Testing

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


Flammability IndexAS 1530.2-1993Low ≤5
Nominal Thickness0.45 mm
Duty RatingAS/NZS 4200.1:2017Light Wall
Vapour ControlASTM E96Class 4 Vapour Permeable
Vapour PermeanceASTM E963.7982 μg/N.s
Water ControlAS/NZS 4201.4:1994Water Barrier
Air ControlAS/NZS 4200.1:2017Air 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%
EmmitanceAS/NZS 4201.5:1994Printed side: 0.58, White side: 0.56
Vapour Permeance
Vapour Permeance: 3.7982 μg/N·s
Vapour Resistance: 0.2632 MN·s/g
WVTR: 468.25 g/m2·24hr
Tested in accordance with AS/NZS 4200.1:2017.

Fire Performance
Flammability Index

Low (≤5)
Tested in accordance with AS 1530.2-1993 – Methods for fire tests on building materials, components and structures Part 2: Test for flammability of materials.

Bushfire Attack Levels
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.

Specification Notes
When specifying, state the following:

Product Name: Trade Select™ VapourTech® Wall

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

Emittance Value: 0.58, 0.56
Emittance Classification: IR Non-Reflective, IR Non-Reflective
Vapour Permeance: 3.7982 ug/N.s
Vapour Control Classification: Class 4 Vapour Permeable
Water Control Classification: Water Barrier
Air Control Classification: Air Barrier
Flammability Classification: Low (≤5)
Duty Classification: Light Wall in accordance with AS/NZS 4200.1:2017