平屋面渗漏是目前建筑防水工程中的“四漏”现象之一。据近年来全国房产系统对北京、上海、天津等13个城市的49401幢房屋,2521376m~2屋面面积渗漏情况的调查,渗漏率高达70.4％,特别是现浇天沟檐口沿墙内渗漏,占相当大的比重。因此,屋面防渗漏已成为建筑业非常关心的课题。 Flat roof leakage is one of the “four leakages” in the current construction waterproofing project. According to a survey conducted by the National Real Estate System over 49,401 houses in 13 cities in Beijing, Shanghai, and Tianjin in recent years, the leakage rate of 2521376m~2 roof areas has reached a leakage rate as high as 70.4%, especially infiltration of in-situ concrete gutters along the wall. Leakage, accounting for a considerable proportion. Therefore, roof leakage has become a topic of great concern in the construction industry.