How to choose waterproof material for steel structure installation?

1. The waterproof materials selected for the steel structure installation roof project shall meet the following requirements. The type, model and specification of the waterproof materials shall be indicated on the drawings, and their main physical properties shall meet the requirements of the specification for the quality index of the materials;

2. Considering the conditions of the construction environment and the operability of the process, the materials used shall be compatible under the following conditions: waterproof materials (refers to coiled materials and coatings, the same below) and base treatment agent, waterproof materials and adhesives, waterproof materials and sealing materials, waterproof materials and protective layer coatings, composite use of two kinds of waterproof materials, base treatment agent and sealing materials.

3. According to the nature of the building and the use function of the roof, the selection of waterproof materials should not only meet the requirements of this specification, but also meet the following requirements: for the exposed non accessible roof, the waterproof materials with strong adhesion to the base, excellent UV resistance, thermal aging retention rate, acid rain resistance and puncture resistance should be selected. The waterproof material with good puncture resistance, mildew resistance and high tensile strength should be selected for the accessible roof. Waterproof materials with excellent corrosion resistance, mildew resistance and puncture resistance should be selected for water storage roof and planting roof. Thin shell, fabricated structure, steel structure and other long-span building roofs should be made of waterproof materials with light weight, good heat resistance and deformation adaptability. For inverted roof, waterproof materials with good deformation adaptability and high joint sealing guarantee rate should be selected. For sloping roof, waterproof materials with strong adhesion to base and low temperature sensitivity should be selected. The sealing materials with strong adhesion to the base, excellent low temperature resistance and certain displacement adaptability should be selected for roof joint sealing and waterproofing.

4. The steel structure installation roof should choose the insulation material with low water absorption, low density and thermal conductivity, and certain strength; The moisture content of the closed insulation layer can be determined by calculation according to the relative moisture content corresponding to the local annual average relative humidity and the mass water absorption of the material. Waterproof and thermal insulation materials are commonly used in roof engineering.