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读了1999年第3期《保温屋面排汽新作法》一文后,有以下两点不同看法。(1)现行屋面工程技术规范已规定女儿墙取消挑眉砖作法。(2)把 PVC 管放在保温层中间或结构层上,不利于水汽的排除,这是因为水汽总是往高处走。现将我们近几年的作法介绍如下。1.用 PVC 管代替分格缝兼作排汽道用φ20～φ25 PVC 电线管代替分格缝,在管的一侧每隔50 mm 交错钻孔二
After reading the 3rd issue of “Insulating roof exhaust new approach” article in 1999, there are two different views. (1) The current roofing technical specifications have stipulated that the girl’s wall should be removed. (2) The PVC pipe in the middle of the insulation layer or structure, is not conducive to the exclusion of water vapor, it is because the water vapor is always going away. Now we introduce the practices in recent years as follows. 1. Use PVC pipe instead of sub-grid seam also serve as a vent with φ20 ~ φ25 PVC pipe instead of seam, in the side of the pipe every 50 mm cross-drilling two