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1）Clean the base until it is clean,dry,free of oil stains,dust or other loose parts. If the basal surface is rusted, it can be sprayed with special purpose interface treating agent matched with XINIUPI self fusion type special multifunctional protective membrane,rust removal treatment for the rusty area, and the rusted-out areas/parts should be repaired or replaced.
2） Clean the gutter to ensure smooth drainage of the roof, such as serious corrosion damage, can be replaced as a whole.
3.）Correct or replace metal tiles with serious deformation.
