Retention Roof
Flow Control Extensive and Semi-Intensive

Characteristics

  • For extensive green roofs
  • Optigreen Water Retention Box WRB, including Flow Control system
  • Additional storage volume of approximately 75 l/m² in Water Retention Box WRB 85i. Maximum storage volume of 140 l/m² in Water Retention Box WRB 150
  • Very low discharge through individual Flow Control system setting
  • Discharge yield, also less than 1 l/s adjustable
  • Low weight due to cavity type construction of the Water Retention Box WRB
  • Increased evaporation performance due to integrated capillary system
  • Rainfall runoff model with the RWS 4.0 rainwater simulation program
Weight100-300 kg/m² or 1.0-3.0 KN/m² 
Build-up depth140 - 250 mm
Roof pitch0° 
Vegetation formsedum-herbs-grasses 
Water retentionProject specific settings possible
Discharge coefficientProject specific settings possible
Discharge yieldProject specific settings possible
Water storage in
green roof build-up
from 21 l/m²
Additional maxiumum water storage
in Water Retention Box WRB
from 75 - 140 l/m²
Ecological value
Maintenance costs
Cost factor

PERENNIAL PLANTS AND/OR OPTIGREEN SEED MIX EKR AND SEDUM SHOOTS

OPTIGREEN-EXTENSIVE SUBSTRATE (60 MM FOR EXTENSIVE SEDUM GREENING AND 80 -200 MM FOR SEDUM-GRASS-HERBES-, RESPECTIVELY LIGHT INTENSIVE GREENING)

  • A substrate with high water storage capacity and good air porosity, tailored to extensive multi layer systems.
  • Download Data Sheet

Optigreen Suction and Capillary Fleece RMS 500 K

  • Optimal water distribution below the substrate layer

Optigreen Water Retention Box WRB 80F

  • High cavity volume for water retention
  • Water retention adjustable to the green roof build-up above
  • Low weight
  • High water storage capacity
  • Stackable for easy transport
  • With capillary columns
  • Download Data Sheet

Optigreen Flow Control System
(not shown in the drawing)

  • Throttle with defined perforations that allows a delayed water discharge
  • Permanent accumulation of stormwater possible up to a defined height

OPTIGREEN PROTECTION AND STORAGE FLEECE RMS 300

  • Protects Root Barrier membrane or roof membrane from damage and stores water
  • Download Data Sheet