1. At first, determine the area need to waterproof. The metal roof generally have the following areas need to do waterproofing:
The Waterproof weak link of metal roof, such as horizontal lap joint, vertical lap joint, fan mouth, pipe out of the roof, all around of the plane skylight, ridge, gutter, junction of metal sheet and parapet and screw firmware etc..
2. Primary pretreatment of roof leakage in colored steel sheet.
Carefully inspect the metal roof before construction to ensure that the metal roof is firm, clean, non corroding, no frozen.
When the situation does not meet the above, technical staff of CAMELSTEEL suggested that the following treatment:
A. Replace the rusted firmware and add the firmware in place.
B. Polish the rusty area with derusting abrasive paper until it appears metallic color, then coated with a base layer.
C. Remove the frozen objects, dust and other dirt.
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