| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an outer covering building material inconspicuous in a rain streak stain, even without having a hydrophilic coating film and a coping.SOLUTION: An outer covering building material 10 is constituted of a corrugated plate-like metal plate having a plurality of parallel grooves 11 on a surface. The grooves 11 comprise parallel two ridgelines 12, a valley bottom 13 positioned between the ridgelines 12, a first inclined plane 14 connected to one ridgeline 12 from the valley bottom 13 and a second inclined plane 15 connected to the other ridgeline 12 from the valley bottom 13. A depth D of the grooves is 0.15 mm or more, and a pitch P of the grooves is 1.0-3.0 mm. The outer covering building material 10 performs the effect of making the rain streak stain by rainwater of flowing by crossing the grooves 11, inconspicuous.</p> |
