Drainage Board

Description : High-density polyethylene (HDPE) dimple drainage board is a lightweight, durable subsurface drainage and protection layer used behind retaining walls, below slab-on-grade, on green roofs, podium decks, tunnels, basements, foundations, and landscaped areas. The molded dimples create an air gap and continuous flow channels that relieve hydrostatic pressure, protect waterproofing membranes from backfill damage, and promote fast water evacuation to perimeter drains. Boards are available with or without bonded nonwoven geotextile to filter soil fines.⚪【 Application】: ❶Subgrade & Below-Grade● Foundation walls, basement walls, blindside waterproofing ● Under slab-on-grade, crawl spaces, tunnels, subways, underground parking ❷ Siteworks & Landscaping ● Retaining walls, planter boxes, garden beds, podium decks, terraces, plaza decks ● Sports fields, golf courses, parks, softscape/hardscape interfaces ❸ Roofing & Podiums ● Green roofs (extensive/intensive), blue/green roofs, inverted roofs beneath pavers ❹ Water Management ● French drains, edge drains, drainage blankets, cut-off trenches ❺ Civil & Infrastructure ● Landfills (as protection/drainage layer), dams/embankments (non-critical zones), road/rail subgrades ❻ Buildings & Interiors (moisture control) ● Interior basement retrofit behind wall systems (with ventilation path) ❼Erosion & Slope Protection ● Behind shotcrete or revetment systems (with geotextile overlay)⚪【Specification】:●Base Material:: HDPE (high-density polyethylene), UV-stabilized●Dimple Height ::8, 10, 12, 20, 25, 30, 40, 60 mm (custom on request)●Sheet Thickness ~0.6–1.2 mm (base sheet), higher available●Roll Width 2.0–3.0 m (6.6–9.8 ft)●Roll Length 10–30 m (33–98 ft); custom lengths available●Color:: Black standard; white/green/blue on request

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