屋面防水工程是房屋建筑的一项重要工程，工程质量好坏直接影响建筑物的寿命以及业主的生产和生活。
Roof waterproof project is an important project of housing construction, the quality of the project directly affects the life of the building and the production and life of the owners.
屋面渗漏是建筑工程中最常见的通病，我们认为：要保证防水工程的质量，设计是前提，施工是关键。还要选择合适的防水材料（特别是在深圳地区，气温高、太阳辐射强烈、雨水多，防水材料的选择显得更加重要）。
Roof leakage is the most common problem in construction engineering, we think: to ensure the quality of waterproof engineering, design is the premise, construction is the key. It is necessary to choose suitable waterproof materials (especially in Shenzhen, where the temperature is high, the solar radiation is strong, and there is a lot of rain, so the selection of waterproof materials is more important).
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一、屋面坡度的设计要求
1、 Design requirements of roof slope
坡度是屋面排水、防水的首要基础，同时要依据屋面设计的落水口分布位置，划分排水区域。一般以房屋面横向宽度分中为屋脊中心线，阳台反向落水口反坡，纵向以两落水口之间划分区域分岭。排水坡度在2％一3％ ,这样可减少屋面积水弊病。
Slope is the primary basis of roof drainage and waterproofing, and the drainage area should be divided according to the distribution of roof water outlets. Generally, the center line of the roof is divided by the transverse width of the roof, the balcony is divided by the opposite water outlet and the opposite slope, and the area is divided by the two water outlets in the longitudinal direction. The drainage gradient is 2% - 3%, which can reduce the water problem of the house area.