Composite Drainage Board is the lightweight three dimensional geocomposite with flat back which is pressed against an underground structure used for subsurface water management method. BPM Composite Drainage Board is lightweight, easy to use and cost effective when compared to traditional drainage methods, and it is the most advanced and versatile geo-composite product suitable for all your horizontal and vertical drainage applications such as roof garden drainage, landscape, terraces and patios under pavers, subterranean building protection, etc. Contact whatsapp:+8615153839268 emily@hdpetgm.com