Public roof - gravel lawn
Public roofs gravel lawns are green areas on roofs that can be used by people, cars and trucks. The superstructures must be matched to the planned usage category and the roof construction/insulation.
System structure public roof - gravel lawn
Note: Click on the marked points to get more information!

Lawn
Gravel lawn surfacing layer SRD (optional)
- 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)
Filtervlies FIL 300
- Prevents fine particles from forming sludge in the drainage layer
- high water permeability
- very high robustness class GRC 5
- learn more: Filter fleece 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
- learn more: Building protection and drainage element FKD 60BU
- learn more: Drainage material Perl 8/16
Protection, seperation and slip layer SGL 500 and seperation and slip sheet TGF 0.2
- learn more: Protection, seperation and slip layer SGL 500
- learn more: Seperation and slip sheet TGF 0.2
Technical specifications
Weight | from 400 kg/m² or 4.0 kN/m² |
Build-up depth | from 370 mm |
Roof pitch* | 1-5° |
Load class | 1-3 (max. 20 t vehicle weight) |
* Roofs with zero degree falls do not meet FLL Green Roof Guidelines and Optigrün systems should not be used without consultation.
Downloads
- Checklist (pdf) 175 KB
- CAD-Drawing (pdf) 983 KB
- CAD-Drawing (dwg) 821 KB