polyethylene net/geotextile drainage composite which is available with geotextile on 0-2 sides

polystyrene insulating and drainage product in the nature of a molded expanded foam board designed to provide insulation and drainage to relieve hydrostatic pressure on foundations, sold as a unit with foundation drainage system

PLASTIC PLATE COVERED BY PERMEABLE WOVEN OR NON-WOVEN SYNTHETIC MATERIAL OR PAPER ACTING AS A FILTER, BEING FOR USE IN DRAINING OF SOIL