Trade Select™ VapourTech® Wall is used as a wall wrap behind fibre cement and timber cladding in most Australian climates. NOTE: For ABCB Climate Zone 1 and north of The Tropic of Capricorn in Climate Zone 2, substitute VapourTech® Wall with a Class 1 or Class 2 Vapour Barrier such as Trade Select™ Sarking HVB or Trade Select™ Sarking xR. Trade Select™ VapourTech® Wall can be used as wall wrap in brick veneer systems. Where reflective cavities are desired, Trade Select™ Wall Wrap xRS Micro-perforated is the preferred membrane for brick veneer systems outside of the humid tropics. If installed behind non-absorbent claddings such as steel, provision should be given for adequate drainage of any trapped moisture.