规定了实验室中用于评估建筑物外墙构件之间非开口接缝透气性的试验方法，无论接缝是否经历过老化。不适用于组件内的接缝（例如，固定在窗框中并用玻璃化合物密封的玻璃之间的接缝）。

Specifies the test method to be used in laboratories for assessing the air permeability of non-opening joints between components in the exterior walls of buildings, whether the joints have been subjected to prior ageing or not. Does not apply to joints within components (for example the joint between glass fixed in a window frame and sealed with a glazing compound).