A dimpled and perforated HDPE sheet (Deep-drawn recycled HDPE). A lightweight rigid drainage board with a water reservoir function, with a channelling system for the excess water produced during precipitation events. For use on extensive green roofs with a single or multi-layer construction and under path surfaces with a minimum 60 mm substrate. Also suitable for inverted roofs.
- Suitable for use on Extensive and Intensive Green roof, Podium and Inverted Roof Systems
- Functional in Sedum, Wildflower and Biodiverse Systems
- Scientifically proven to provide drainage and water storage.
- Resistant to root penetration
- Highly resistant to acids and alkalis
Don’t forget to order filter fleece separately for this product!
Features and benefitsAll Green Roofs
Suitable for use on all green roof systems and Podium systems.Drainage
Provides drainage, water storage and filtration.Geo Textile
Butted together with geo-textile filter fleece overlapping abutments.Resistant
Resistant to root penetration and to chemicals.
Physical Properties Composition HDPE Physical Properties Thickness at 2kPa (EN ISO 9863-1) 25mm Physical Properties Colour Black Physical Properties Unit Supplied Sheets Physical Properties Unit Width 1m Physical Properties Unit Length 1m Physical Properties Sheet Weight 1.35kg Technical Properties Compressive Strength (kPa) 200 EN ISO 25619-2 Technical Properties Filling Volume (Small naps facing up (Surface Side)) 14.5L Technical Properties Filling Volume (Large naps facing up (Greening Side)) 7.5L Technical Properties Water Permeability (l/m².s) 100 EN ISO 11058 Technical Properties Apparent opening size (µm) 80 EN ISO 12956
All your materials arrive in one delivery from our UK farm and are simple to unload and install straight away.
DRRD25 Drainage Board
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