Flexodrain and Drainomat are lightweight, high strength, high impact polypropylene modular drainage cell which are especially designed for sub-surface drainage and waterproofing membrane protection. Draincells offer architects and developers extensive design fixibility and have a wide range of applications in the landscape, building and construction industries. These Draincells are easy to install by interlocking them horizontally and vertically. Drain cell also act as a protection layer over waterproofing membrane, and also creates a thermal insulation barrier. The open surface design and high internal void volume enables the rapid capture and transport of high water volumes