| 摘要 |
PROBLEM TO BE SOLVED: To prevent the corroding action of rainwater on a metallic plat part of a roof by laying a sacrificially corroding member composed of a zinc plate, an aluminum plate or the like on a boundary part with a copper plate on the downstream of water in a lowly roofing roof tile. SOLUTION: A sacrificially corroding member C is arranged in a boundary part with a copper plate on the downstream of water in a lowly roofing roof tile, and this is used as a sacrificially corroding member. Then, acid rain flowing down from the ridge direction is changed in the neutralizing side, and flows down to a metallic roof, and corrosion of a metallic roof main body part is prevented, or unnatural discoloration is restrained. A main body 1 of this sacrificially corroding member C is composed of a base board 11 and zinc plates 2 and 2, and a ridge side part of the base board 11 is bent upward, and a taper piece 13 is arranged through a rising bending part 12, and execution work is desirably facilitated. Slit holes 21 and 21 are bored in large numbers in the zinc plates 2, and the contact area with rainwater is expanded, and a sacrificially corroding effect can be desirably increased. |
