Drain boards are HDPE sheets featuring raised studs (dimples) bonded to a Non- woven geotextile. They serve as a protective drainage layer over waterproofing membranes, shielding them from physical damage and chemical exposure during back- filling. The dimples create an air gap that allows water to drain away from foundations or walls, reducing hydrostatic pressure. These boards are widely used on basement or retaining walls, tunnels, green roofs, planter boxes, and terrace gardens to ensure both waterproofing integrity and efficient drainage.