Delta-Floraxx by Cosella-Dörken Products is a dimple-shaped membrane designed for use in green-roof applications. Water drains away through the open channel system between the dimples to ensure balance between water retention and surplus drainage, and the dimples allow for water retention of up to 21 fluid ounces per square foot. Available in a 6.6' by 65' roll, it is installed on top of a root barrier. delta-floraxx.com
Delta-Floraxx by Cosella-Dörken Products is a dimple-shaped membrane designed for use in green-roof applications. Water drains away through the open channel system between the dimples to ensure balance between water retention and surplus drainage, and the dimples allow for water retention of up to 21 fluid ounces per square foot. Available in a 6.6' by 65' roll, it is installed on top of a root barrier. delta-floraxx.com

Delta-Floraxx from Cosella-Dörken Products is a perforated drainage board for use in green-roof assemblies. Made from 60% recycled high-density polyethylene, the membrane features 20-mm-high octagon-shaped dimples to retain rainwater, holding up to 21.98 fluid ounces per square foot. Surplus water then drains through perforations and between dimples to an open-channel system under the dimple sheet. The board comes in rolls measuring 6.6' by 65'. cosella-dorken.com; 888.433.5824.