Products / DELTA-TERRAXX

DELTA-TERRAXX is a three-dimensional drainage composite made of a dimpled high-density polyethylene (HDPE) drainage core with a gray polypropylene geotextile heat-bonded to the dimples. Dörken lists it for flat roof decks, PRMA roof systems, green roofs and paved or ballasted roofs, where it is laid over the roof membrane as a drainage, filtration and protection layer, and also for podium decks, walkable paving-stone patios and below-grade walls. The technical data sheet (dated 08/21/2025) prints a dimple height of about 9 mm (2/5 inch), a compressive strength of 8,900 psf (ASTM D6364), a geocomposite flow rate of 16.6 gal/min/ft at a hydraulic gradient of 1.0 (ASTM D4716), and 2 m by 12.5 m (6 ft 7 in by 41 ft) rolls of about 40 lb. It is offered in Horizontal, Vertical and Blind Side application versions, and the data sheet limits UV exposure to 30 days.