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排汽屋面是针对保温层及找平层施工时积聚的多余水分一时难以干燥的情况而设置的,能有效地解决卷材屋面的起鼓、开裂问题。《屋面工程技术规范》(GB 50207-94)提出:屋面保温层和找平层干燥有困难时,宜采用排汽屋面。但由于设计、施工等方面的原因,一些屋面常有排汽效果
The exhaust roof is set for the situation where the excess moisture accumulated during the construction of the insulation layer and the screed layer is difficult to dry for a while, and can effectively solve the problem of kicking and cracking of the coiled roof. “Technical Specifications for Roof Engineering” (GB 50207-94) proposes that exhaust roofing should be adopted when there is difficulty in drying the roof insulation layer and the screed. However, due to design, construction and other reasons, some roofs often have exhaust effect.