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Retention Roof
Meander 30

  • Technical Data

    Weight *starting at 90 kg/m² or 0.9 KN/m² *
    Build-up depth90 mm
    Roof pitch0-5° (0-9 %)
    Vegetation formsedum
    Water retention50 %
    Discharge coefficientC=0.01 **
    Discharge yield ***3 l/s x ha
    Water storageca. 21 l/m² -40 l/m² temporarily
    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.
    **For the calculation of the dimensions of the pipe we recommend the discharge coefficient C = 0.1. C= 0.01 determined for 2 % according to the FLL guideline.
    ***Determined according to FLL discharge coefficient measurements using a 15-minute reference rainfall r(15) = 300 l/s x ha.



  • Brief Description

    OPTIGREEN VEGETATION MAT

    • Pre-cultivated sedum mat for the  rapid establishment of vegetation in order to prevent wind erosion, with decomposable carrier.
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    OPTIGREEN EXTENSIVE SUBSTRATE TYPE E
    (60 MM) *

    • A substrate with high water storage capacity and good air porosity, tailored to extensive multi layer systems.
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    OPTIGREEN COMBI INSPECTION CHAMBER (NOT SHOWN IN THE DRAWING)

    • Simple control of roof drainage outlets.
    • Extendable in 100 mm increments.
    • Side and top drainage openings.
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    OPTIGREEN FILTER FLEECE TYPE 105

    • Prevents fine particles from forming sludge in the drainage layer; high water permeability.
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    OPTIGREEN MEANDER PANELS 30 (30 MM)

    • Delays discharge of surplus water.
    • Prevents accumulation of water on roofs with minimal or no drainage falls and over long drainage runs.
    • Lighter build-up with better drainage performance. 
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          OPTIGREEN PROTECTION AND STORAGE FLEECE TYPE 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.
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