Also known as drainage and storage boards, these are made from high-density polypropylene and formed through high-pressure injection molding. They feature a three-dimensional mesh and certain support rigidity, enabling both drainage and water storage. Primarily used in rooftop gardens, underground parking decks, green squares, and road greening projects within parks.

During installation, the drainage boards should be placed with the raised side down and the flat side up, connected by clips between each sheet. Once laid, cover it with geotextile fabric before beginning backfilling. Start backfilling after the geotextile is in place, filling from the perimeter inward. Only after the backfill exceeds 50 centimeters in height can vehicles be driven on top.

Perforated Drainage Boards feature lightweight, high load-bearing capacity, water drainage and retention, thermal insulation, easy transportation, ease of installation, and environmental-friendly non-toxic properties.