屋面坡度的设计要求
Design requirements for 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 for roof drainage and waterproof. At the same time, the drainage area shall be divided according to the distribution position of water outlet in roof design. Generally, the transverse width of the house roof is divided into the center line of the ridge, the reverse slope of the balcony reverse water outlet, and the regional ridge is divided longitudinally between the two water outlets. The drainage slope is between 2% and 3%, which can reduce the water problem in the house area.
二、正确选择防水材料
2、 Correct selection of waterproof materials
防水材料的选择对防水层质量和耐用年限有极大的的影响，正确选择、合理使用防水材料是屋面防水设计成败的关键之一，虽然目前柔性防水材料的种类繁多，性能各异，以前采用沥青卷材，耐穿刺性能差，低温柔性差，易老化，防水层耐用年限短。
The selection of waterproof materials has a great impact on the quality and durability of the waterproof layer. The correct selection and rational use of waterproof materials is one of the keys to the success or failure of roof waterproof design. Although there are many kinds of flexible waterproof materials with different properties, the asphalt coiled materials used in the past have poor puncture resistance, poor low-temperature flexibility, easy aging and short durability of the waterproof layer.
而PVC改性JDG金属穿线管 不锈钢链板 隔离墩模具 检查井钢模具 流水槽模具 阶梯护坡模具 护坡砖模具 遮板模具 沥青卷材，具有耐老化，耐候性，延伸率大，使用寿命长。同时施工简单，造价低，便于维修，使用效果好。
PVC modified asphalt coiled material has aging resistance, weather resistance, large elongation and long service life. At the same time, it has the advantages of simple construction, low cost, easy maintenance and good use effect.