Hygrothermal Performance of Building Materials and Products - Determination of Water Vapour Transmission Properties
|Publication Date:||15 June 2001|
|ICS Code (Thermal insulation of buildings):||91.120.10|
This standard specifies a method based on cup tests for determining the water vapour permeance of building products and the water vapour permeability of building materials under isothermal conditions. Different sets of test conditions are specified.
The general principles are applicable to all hygroscopic and non
hygroscopic building materials and products, including those with
facings and integral skins. Annexes give details of test methods
suitable for different material types. This standard is not
applicable in the case of test specimens with water vapour
The results obtained by this method are suitable for design purposes, production control and for inclusion in product specifications.