| 摘要 |
PROBLEM TO BE SOLVED: To provide a drain pipe for repair capable of substantially preventing diameter reduction of a repaired roof drain and capable of surely preventing rainwater from being infiltrated from an end face of a waterproof layer to upper and lower surfaces, and a roof drain repair method using the same.SOLUTION: A drain pipe 10 for repair comprises: a straight pipe part 12 in a hollow cylindrical shape; and a flange part 14 in a hollow disc shape, is integrated by integral molding, heat deposition or adhesion and is formed from a heat expansion resin which can be softened and expanded by hot air heating as a whole. The straight pipe part 12 is softened and expanded by hot air heating, an outer surface 12a of the straight pipe part is adhered to an inner surface of a drain hole 9 and an inner surface of a sewage pipe 2, and an outer peripheral portion of the flange part 14 is bonded to a waterproof layer 3 on a surface of a skeleton 1 by heat deposition or adhesion. |
