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Garden Roof
Solution 1 (with Drainage Board): 0-5°

  • Technical Specifications

    Weight320-680 kg/m² or 3.2-6.8 KN/m² * 
    Build-up depth260-470 mm
    Roof pitch0–5° (0–9 %)
    Vegetation formperennial plants-shrubs-trees-lawn areas
    Water retention70-95 %
    Discharge coefficientCs=0.2
    Water storageapprox. 110-160 l/m²
    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. In accordance with the requirements of the FLL guideline, the specified weight does not take temporary water accumulation into account.




  • Brief Description

    Optigreen Intensive Substrate i (230 – 330 mm)
    Alternative: Optigreen Lawn Substrate R (200 – 300mm)

    Optigreen Filter Fleece FIL 105

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

    Optigreen Drainage and Storage Element FKD 60BO (60 mm)

    • High water storage capacity
    • Prevents accumulation of water on roofs with 0° drainage falls and long drainage runs
    • Lightweight build-up with high drainage capacity and good drainage performance
    • Filled with Perl drainage material
    • Download Data Sheet 60BO
    • Download Data Sheet Perl 8/16

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

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


    • Protects root barrier membrane or roof membrane against damage and stores water
    • For higher mechanical demands: Optigreen Protection and Storage Fleece RMS 900 resp. 1200
    • Download Data Sheet
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