Description

This Standard specifies the installation procedures for a pliable building membrane (also known as underlay) when it is intended to act as a sarking membrane or thermal insulation, or a vapour barrier in a domestic, commercial or industrial building. It specifies the installation requirements when the membrane is used under sheet roofing, tile roofing or in walls.

Scope

This standard sets out the installation procedures for a pliable building membrane (also known as underlay) in any of the following circumstances:

• (a) When it is intended to act as a sarking membrane or thermal insulation or a vapour barrier when installed in a building structure.
• (b) When installed either independently, or as a facing to other materials such as insulation materials.
• (c) When installed in domestic, commercial or industrial buildings.

The installation of pliable building membranes in air-handling ducts and under concrete slabs are outside the scope of this standard.