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How to use waterproof materials

&Nbsp;   use waterproof materials are an important part of waterproof design, is of decisive importance. Now a wide variety of material, form, properties, price disparities with different construction methods. Therefore requests that the selected material must meet the requirements engineering: engineering geology and hydrology, structure, construction season, local climate, building function and special parts, has specific requirements for waterproof material.
&Nbsp;  , climate selection 1, China's vast North-South disparities in high and low temperatures and summer temperatures up to more than 40 degrees South, continue for several days, exposed to the roofing waterproof layer, long time exposure, prematurely pushing water resistance. Selection of materials should be resistant to ultraviolet radiation, high softening point, APP modified bitumen membrane, EPDM rubber sheet, PVC.
&Nbsp;   2, southern rainy, snowy North, drought in the West. Annual rainfall of 1000 mm or more of about 15 provinces and autonomous regions, and rainy day for 200 days, the roof is always wet, poor drainage, water, dried for several months, soak the waterproof layer. Bad water resistance of the coatings, prone to emulsify or rehydrated reduction; not blister-resistant Binder, seriously reduce bonding strength, viscosity polymer membrane of combined joint cracking, particularly drainage gutters, water soaked and leak I was for a long time. Water resistant material should be used, such as tires, glass fiber polyester modified asphalt coiled material or water resistant adhesive bonding polymer membrane.
&Nbsp;   3, drought in the Northwest, evaporation is greater than rainfall, often missing roof after rain water. Clearly the degree of waterproofing in the area reduced, secondary building a fortification can also meet water requirements, if well cover, can achieve the required length of life.
&Nbsp;   4, cold and snowy areas, some waterproof materials stand up to low temperature expansion contraction cycle changes, premature aging of fracture. Four or five months of the year is covered with white snow, snow waterproof layer impregnated for a long time, and snow melting and ice, frost resistance is not strong, water-resistant side adhesive, will fail. These areas should use SBS modified asphalt coiled material or weld seam of polymer membrane, if the choice is not resistant to low temperature, should be inverted roofing waterproof material.
&Nbsp;   5, waterproof construction season should also not be ignored. In North China's cold season, water soluble paints cannot be used, adhesives will reduce the adhesion at 5 c, below zero temperatures not construction. Design time is summer, when construction is 39, adhesives the concrete and congeal, loss of adhesion. Coil joint will not bond, resulting in construction failure, delay duration, tuition materials. Summer construction waterproof material of cold in the Northeast, but in the cold winter, of the completion of the waterproof layer, unable to withstand the cold of frost heave, and premature waste fall. Design should pay attention to understanding the material temperature.
&Nbsp;   II, construction site selection of different parts of the building, on waterproof material requirements are not the same. Each material has its own strengths and weaknesses, not baodatianxia of a material, where the material is not, and various materials can only be complementary, and not replace, each has its place. Roof waterproofing and basement waterproofing, requirements of different materials, waterproofing and waterproofing of the wall between the bath more difference, sloping roof, form a complex roofing, sheet metal roof of grass-roots are not the same, selection is when drinking fine.
&Nbsp;   1, waterproof layer exposed nature, hot sunlight exposure, wind gales, snow and rain erosion, cold summer temperatures, and changes in temperature between day and night swelling and shrinkage repeatedly, without quality of materials and protective measures, it is difficult to meet the requirements of durability. So choose high tensile strength, elongation, good ageing resistance of waterproofing materials. Polyester polymer modified bitumen membrane, EPDM rubber sheet, p-PVC (weld seam), one-component polyurethane coating (with cover). Roof design would also like to go into the details later.
&Nbsp;   2, why did wall leakage, because now the walls are too thin, mostly light block, a large number of internal and external seams, Tang is doors and Windows and wall joints, sealing is not strict, rain water by infiltration in the seam. Walls cannot be used for waterproofing volume material, only with paint, and exterior decoration materials. Windows install Tang seam sealant alone can solve the problem.
&Nbsp;   3, underground engineering waterproof material. Underground waterproofing layer for many years immersed in water or very wet soil, waterproof materials must be water resistance. Volumes cannot use tires made of perishable materials, floor waterproof layer thick and has some ability to resist a thorn of waterproof material. The best laminated 6 mm ~8 mm thick. If you opt for synthetic polymer membrane, optimum heat-welded seams. Adhesive stitching, the glue should be excellent water resistance, otherwise the coil cannot be selected. Use waterproof coating should be careful. Separate uses thickness 2.5 mm, combined with coil with the thickness to 2 mm thick.
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