Foil Vapour Shield 101

Scope of use

Vapour Shield is intended for use as a vapour barrier ideally for skillion roof construction where condensation and moisture vapour control are required behind internal cladding.  It is laid as a waterproof membrane until the roof is fixed, after which it acts as a vapour barrier layer during its serviceable life. 

Where a vapour barrier is installed, its location within the built element is critical - for typical habitable spaces, it must be on the warm side of the element.  Incorrect locating a vapour barrier is likely to cause more problems than it solves.  When located on the cold side of a building element, the risk of condensation forming on the vapour barrier significantly increases. 

To perform effectively, a vapour barrier must also be airtight as typically airflows carry moisture at a much greater rate than diffusion,  which. would undermine the effectiveness of the vapour barrier. 

• Buildings constructed with timber or steel framing. 
• Unaffected by LOSP treated timber.  However, LOSP treated timber must have sufficient time for the solvent chemical to flash off in well ventilated area.  Recommended minimum 7 days. 
• 2.13m x 47m [100m2] unfolded size. 
• 140+/- 8 micron in thickness.
• Store on end in dry conditions protected from weather and direct sunlight.