Abstract：
The height and position of vapor permeation hole of traditional vapor permeation roof may damage the visual decorative effect, impede activities on roof, reduce the overall function of roof, waterproof construction of vapor permeation hole may be complex and roof leakage may be easily caused. Based on engineering practices, new construction technique of roof vapor permeation system was explored. This technique realized technical innovation without changing the function of roof vapor permeation. No vapor permeation hole was set on roof, but vapor permeation measures were adopted to set parapet around the roof or other roof structures were built, such as overhung staircase and draught flue of equipment room, etc. After inspection, it showed that favorable quality, technical and economic effects of roof vapor permeation system were realized.
