ISO 12572:2016规定了一种基于杯子测试的方法，用于确定建筑产品的水蒸气渗透性和等温条件下建筑材料的水蒸汽渗透性。指定了不同的测试条件集。 一般原则适用于所有吸湿和非吸湿性建筑材料和产品，包括绝缘材料，包括具有面层和整体表皮的建筑材料和产品。附件详细介绍了适用于不同材料类型的测试方法。 该方法得到的结果适用于设计目的，生产控制和产品规格

ISO 12572:2016 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 insulation materials and including those with facings and integral skins. Annexes give details of test methods suitable for different material types. The results obtained by this method are suitable for design purposes, production control and for inclusion in product specifications.