防水材料的选用

    选用防水材料是防水设计的重要一环，具有决定性的意义。现在材料品种繁多、形态不一，性能各异，价格高低悬殊；施工方式各具不同。因此要求选定的材料必须适应工程要求：工程地质水文，结构类型，施工季节，当地气候，建筑使用功能以及特殊部位等，对防水材料都有具体要求。
    一、 气候条件选材
    1、我国地域辽阔，南北气温高低悬殊，江南地区夏季气温达四十余度，持续数日，暴露在屋面的防水层，长时间的暴晒，过早地推动防水功能。选用的材料应是耐紫外线强的，软化点高的，如APP改性沥青卷材、三元乙丙橡胶卷材、聚氯乙烯卷材。
    2、南方多雨，北方多雪，西部干旱。年降雨量在1000mm以上的约有15个省市自治区，阴雨连绵的日子的二百天，屋面始
Selection of waterproof material

    Use waterproof materials waterproof design an important part of decisive significance. Now a wide variety of materials, different forms, performance varied, the price disparity between high and low; construction with a different way. So that the selected material must meet the engineering requirements: engineering geology, hydrology, structure type, construction season, local climate, building functions, and special parts, etc., have specific requirements on the waterproof material.
    I. Selection of climatic conditions
    1, China's vast, high and low temperature disparity between north and south, south in summer temperature of more than forty degrees for several days, exposed roof waterproofing layer, long exposure, prematurely promote water resistance. The material used should be strong resistance to UV, high softening point, such as the APP modified bitumen roll roofing, EPDM, PVC membrane.
    2, South rainy, snowy north, the western dry. More than 1000mm annual rainfall in some 15 provinces, rainy days of 200 days, before the roof