Water Retention Box Wrb 170 - Drainage Boards

Optigrun Water Retentionbox WRB 170 on roofs used as retention areas, under extensive and intensive vegetation as well as traffic areas such as terraces, fire brigade access roads, car parks, etc.With closed, load-distributing structure For temporary and/or permanent storage of rainwater with regulated water discharge through a Flow Control System With Capillary Bridges to transport stored rainwater from the drainage level into the substrate layer and to increase evaporation High compressive strength With freely flowable structure for quick distribution of rainwater within the retention room Suitable for inverted roofs (when used on inverted insulation, no permanent water storage is possible) Material:Recycled PP Nominal thickness:approx. 170 mm Grammage:approx. 11,4 kg/m² Retention volume:approx. 161 l/m2 Cavity volume:approx. 95,0 Vol. % Compressive strength:approx. 800 kN/m² with 10 % compression