DS DS/EN ISO 12572
DS DSEN SO 12572 2001-JUL-16 Hygrothermal performance of buldng materals and products - Determnaton of water vapour transmsson propertes
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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.