| 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 plurality of hollow holes H are formed along the upstream side from the downstream side of the substantially square-shaped tabular hard roofing material A while an upwardly projected stopper 6 is formed to a decoration face on the upstream side.
|
