Products / DELTA-DRAIN (Garden Roof)

DELTA-DRAIN for garden roofs is a two-layer dimpled drainboard that controls the flow of water through a vegetated roof so the growing medium does not oversaturate and cause root rot. Dörken says its middle layer is co-extruded from 60 percent recycled HDPE between two thin virgin-HDPE layers, with a heat-bonded polypropylene TYPAR geotextile on the dimple crowns, and that it comes in 6 foot and 8 foot wide rolls.