Public Roof Gravel Lawn

  • Driveable green areas on roofs; e.e. gravel lawn
  • Creation as gravel lawn (SR)
  • Inverted roof: Suitable with Building Protection and Drainage Element FKD 60 (BO or BU)
Weight from 400 kg/m² or 4,0 kN/m² 
Build-up depth from 25 cm
Roof pitch* 1 - 5°
Load class** 1-3 (max. 20 t vehicle weight)

*Roofs with zero degree falls do not meet FLL guidelines and Optigreen Systems should not be used without consultation.
**In load class 2 (without trucks) a Base Layer is not necessary


Gravel Lawn Surfacing Layer SRD

20-30 mm, specially designed surfacing layer

Gravel Lawn Substrate SR

at least 150 mm, specially designed vegetation layer

Base layer

  • Base layer of gravel 0–32 mm (height 150 mm minimum)

Filter Fleece FIL 300

Prevents fine particles from forming sludge in the drainage layer; high water permeability, very high robustness class GRC 5
Productdetails: Filtervlies FIL 300

Building Protection and Drainage Element FKD 60BU

  • Pressure resistance and accessible by trucks
  • Prevents accumulation of water
  • Lightweight build-up with high drainage capacity
  • Filled with Perl 8/16


Protection, Separation and Slip Layer SGL 500 and Separation and Slip Sheet TGF 0.2