Public Roof Pedestrian

  • Pedestrian areas
  • Areas accessible to cars and trucks
  • Fire accress
  • Can be combined with green surfaces on the roof
  • Shallow depth build-up and lightweight
  • Inverted roof: Suitable with Building Protection and Drainage Element FKD 25 plus and FKD 60
Weight from 400 kg/m² or 4,0 kN/m² 
Build-up depth from 180 mm
Roof pitch* 1 - 5°
Load class 1 (max. 4 kN/m²)

*    Roofs with zero degree falls do not meet FLL guidelines and Optigreen Systems should not be used without consultation.


  • 60 - 120 mm, according to the load requirement
  • Surface layer (e.g. interlocking paving, slabs, concrete)

Bedding material

  • E.g. bedding stone chippings 0–5 mm (30–50 mm)
  • Screed layer for surfacing material

Base layer

  • Base layer of gravel 0–22 or 0–32 mm (100–200 mm)
  • Provides load-bearing capacity and distribution and is used to create inclines
  • Lightweight build-up with Optipor

Building Protection and Drainage Element FKD 10

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