Economy Roof Solution 1 (using drainage board): 0-5°


  • Traditional multi-layered structure including drainage and filter fleece.
  • Particularly affordable roof greening.
  • Low maintenance requirement.
  • Comparably low biodiversity.
  • Generally suitable for the inverted roof; if applicable, minimum load for the wind up-lift protection has to be considered.
Weight *90-140 kg/m² or 0.9-1.4 KN/m²
Build-up depth80 mm
Roof pitch0 – 5° (0 – 9 %)
Vegetation formsedum-herbs-grasses
Water retention50 – 60 % 
Discharge coefficient **C=0.47 - 0.6
Water storageapprox. 25 l/m²
Discharge yield ***141-180 l/s x ha
Ecological value
Maintenance costs
Cost factor
*Depending on the load capacity of the substructure, Optigreen "High Density (HD)" or "Low Density (LD)" substrates can be used. Weight specifications refer to saturated conditions; dry weight is approximately 60 - 70 % of the saturated weight.
**Depends on slope and system solution. Determined at 0° according to FLL guidelines.
***Determined according to FLL discharge coefficient measurements using a 15-minute reference rainfall r(15) = 300 l/s x ha.

Optigreen Hydro-Seeding
(alternatively dry seeding)

  • Optigreen Hydro-Seeding uses a special germinating substrate and a finely tuned Seed Mix Type E, consisting of numerous herbs (also grasses if desired) as well as various sedum shoots
  • Download Data Sheet

Optigreen Extensive Substrate E
(60 mm) *

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

Optigreen Combi Inspection Chamber TKS Plus
(not shown in the drawing)

  • Simple control of roof drainage outlets
  • Extendable in 100 mm increments
  • Side and top drainage openings
  • Download Data Sheet

Optigreen Filter Fleece FIL 105

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

Optigreen Drainage and Water Storage Element FKD 25 (25 mm)

  • Rapid discharge of surplus water
  • Prevents accumulation of water for non-pitched roofs and large drainage lengths
  • Light-weight build-up with high drainage capacity
  • Download Data Sheet

Optigreen Protection and Storage Fleece RMS 300

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