| 摘要 |
PROBLEM TO BE SOLVED: To provide a hard roofing material, which is lightweight, has excellent weatherability and is maintenance-free. SOLUTION: In the hard roofing material A, a downwardly drooped cover piece 2a is formed on the downstream side of a substantially square-shaped tabular decoration face 1, shiplap joints are formed at the right-left end sections of the decoration face 1 and a plurality of hollow holes H are formed along the upstream side from the downstream side.
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