Building a retaining wall can be extremely easy using the drainage cell. Atlantis 20mm and 30mm drainage cell panels can be used to create a water proof retaining wall or basement. The drainage cell creates a structural void between the backed filled material and the wall. The product continuously discharges and water that comes in contact with the wall surface. By doing this it avoids any damage. To create this structure you will require either the 20 or 30mm drainage cell, hydrophillic geo textile fabric, and waterproof polymemebrane.