Retention Roof
Flow Control Intensive

Characteristics

  • For intensive 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
Weight310-520 kg/m² or 3.1-5.2 KN/m²
Build-up depth330-460 mm
Roof pitch0° 
Vegetation formPerennials-shrubs-lawn areas
Water retentionProject specific settings possible
Discharge coefficientProject specific settings possible
Discharge yieldProject specific settings possible
Water storage in
green roof build-up
from 91 l/m²
Additional maximum water storage
in Water Retention Box WRB
from 80 - 140 l/m²
Ecological value
Maintenance costs
Cost factor

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

  • Proven and specially-balanced seed mix consisting of a wide range of herbs and grasses (as desired) as well as numerous types of sedum shoots.
  • Download Data Sheet

OPTIGREEN EXTENSIVE SUBSTRATE i
(min 230 MM)
alternatively: Optigrün Lawn Substrate R
(min. 200 mm)

Optigreen Filter Fleece FIL 105

  • Prevents fine particles from forming sludge in the drainage layer; high water permeability.
  • Download Data Sheet

OPTIGREEN WATER RETENTION BOX WRB 85i

  • Cavity volume suitable for water retention
  • High pressure stability
  • Adjusted to respective setup
  • Low weight
  • 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 defined height

Optigreen Protection and Storage Fleece RMS 900

  • Protects the roof membrane against damage and stores water.
  • For inverted roofs, use the Optigreen Trickle Protection Fleece RS instead of the RMS fleece.
  • Download Data Sheet