The small middle rib increase the strength of profile and design of female side lap rib as spring leg will tightly clip with the next male rib sheet. Furthermore this design give small air pocket to prevent side leakage and no any loss coverage of one rib. It is suitable for roofing side wall and fence tow color are available green and red back side : ceiling white give more brightness to usage area.
With same depth but wider groove than big corrugate sheet the rectangular profile can provide quick drainage of water. |