Preparatory work before construction of roofing steel: 1, before the technical preparations for the roof construction, the construction unit organization and technical management triage roofing engineering drawings, construction plans in the West to grasp the structure and the technical requirements of the actual situation and the preparation of the roofing project Construction works programs or technical measures. This avoids leaving after construction defects, rework, while engineering construction organization based in a planned way to start construction work to prevent omissions, seeking shelter, reverse affect project quality. 2, construction workers and construction procedures steel roofing projects must be waterproof construction by professional teams or waterproof construction unit or supervision company should carefully adhere to the construction workers job card. Construction and construction units should be the construction process, the level of quality of self, self-examination, correction and well construction records, supervision and inspection work to do every step of the unit process, before the next step, after the acceptance level of the job . Steel roofing materials requirements: 1, to meet the durability to meet the durability requirements of waterproof layer waterproof material durability is the most important quality of performance, there is no use value durability, it will fail in a very short period of time, to repair or Rework redone. So to meet the durable life within the combined waterproofing material to be able to resist aging and damage to natural factors, meet people of normal use of functional requirements. 2. Strict grassroots grassroots seal all waterproof layer there are water permeable pores, holes, cracks, and in the course as well as new and larger cracks. So choose waterproof layer must first solve a closed surface of the tomb, closed pores, holes, cracks, require waterproof layer can clog pores, holes and fine cracks, and the base surface bonded to a solid, waterproof layer bottom to prevent channeling, It should also adapt to the grass roots and dynamics of new cracks. 3. waterproof layer temperature adaptability to meet the working environment and the built-up areas related to temperature, (steel waterproof) waterproof layer in which the working environment for selecting the minimum temperature cryogenic flexible waterproof material suited to play a decisive role, waterproofing materials at low temperatures Shihai should have a certain deformation capacity, a certain elongation and toughness, otherwise it will damage the waterproof layer. Shenzhen fruit Seoul good company to undertake a variety of buildings waterproof mending leakage water shutoff (plant, expansion joints, parapet; exterior wall cracks, anti-leakage, Yupeng connecting joints, aluminum day side, window, toilet, water towers, pools , swimming pool, elevator shafts, stairwells, basement) water trap and the overall waterproofing. Longgang District, Shenzhen, Guangdong Province, Road No. 1066 Seoul good fruit Building Telephone:: Shenzhen fruit Seoul good waterproofing address 18,033,060,607 Alibaba store: http: //www.golkia.com/