Plastic drainage board inogadzirwa ne polystyrene (HIPS) kana polyethylene (HDPE) semidziyo.Mukugadzira, pepa repurasitiki rinodhindwa kuti riite chikuva chisina mhango.Nenzira iyi, bhodhi remvura rinogadzirwa.
Inonziwo concave-convex drainage plate, drainage protection plate, garage roof drainage plate, drainage plate, etc. Inonyanya kushandiswa kudhiraivha uye kuchengetedza kongiri inodzivirira denga padenga regaraji.Kuti uve nechokwadi chekuti mvura yakawandisa padenga regaraji inogona kuburitswa mushure mekuzadza.Inogonawo kushandiswa pakuita tunnel drainage.