• BS 7374:1990

BS 7374:1990

Methods of test for water vapour transmission resistance of board materials used in buildings

BSI Group , 11/30/1990

Publisher: BS

File Format: PDF

$80.00$160.02


Two methods for determining permeability resistance. The wet cup method is for testing hygroscopic materials and the dry cup method is for testing non-hygroscopic materials.

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