| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a roofing material for overlap roofing, which eliminates the risk of damage to a waterproof sheet even when overlaid on an existing roofing material via the waterproof sheet. <P>SOLUTION: A step portion 1a lowered downward from above is formed on a front side of an existing roofing material 1. In a roofing material body 10 for overlap roofing, a step part 12 is formed in a region corresponding to the step portion 1a on the front side, while a chamfered step part 16 is formed in a region facing the step portion 1a via a waterproof sheet 3, on a backside. <P>COPYRIGHT: (C)2013,JPO&INPIT |
