防水材料选择应仔细斟酌

The selection of waterproof materials should be carefully considered.

不同的建筑部位，对防水材料的要求也不尽相同。每种材料都有各自的长处和短处，一种材料不能包打天下，用在什么地方都好的“万能”材料是没有的，每种材料都有各自的用武之地。比如屋面防水和地下室防水，要求材性不同；浴间的防水和墙面防水更有差别；坡屋面、外形复杂的屋面、金属板基层屋面防水要求也不相同，选材时均当细酌。

Different building sites have different requirements for waterproofing materials. Each material has its own strengths and weaknesses, a material can not be packaged in the world, where good "omnipotent" material is not available, each material has its own use. For example, roof waterproofing and basement waterproofing, material requirements are different; bathroom waterproofing and wall waterproofing are more different; sloping roof, complex shape of the roof, metal plate base roof waterproofing requirements are different, when selecting materials should be carefully considered.

建筑部位选材

Selection of building site

屋面防水层

Roof waterproof layer

屋面防水层暴露在大自然中，受到炎热日光的暴晒，狂风的吹袭，雨雪的侵蚀，也因昼夜温差的变化胀缩反复，防水材料没有优良的材性和良好的保护措施，难以达到要求的耐久年限。所以应选择抗拉强度高、延伸率大、耐老化好的防水材料。如聚酯胎高聚物改性沥青卷材、单组份聚氨酯涂料（加保护层）。

Roof waterproof layer is exposed to nature, exposed to hot sunlight, wind blowing, rain and snow erosion, but also due to the day and night temperature difference changes repeatedly swelling shrinkage, waterproof material without good timber and good protection measures, it is difficult to meet the requirements of durability. Therefore, we should choose waterproof materials with high tensile strength, high elongation and good aging resistance. Such as polyester tire modified bitumen coil, single component polyurethane coating (plus protective coating).