Blue Roof
Meander FKM 30
Characteristics
- System solutions with defined water retention
- High level of reduction of of water discharge during high intensity rainfall whilst retaining good drainage (even for large roof areas)
- Peak discharge
- Discharge coefficient Cs (according to FLL): 0.01 - 0.17 at 2° roof pitch
- Water storage and discharge delay.
- Suitable for blue roofs
- For green and gravel roofs
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Technical Data
Weight * starting at 90 kg/m² or 0.9 KN/m² * Build-up depth 90 mm Roof pitch 0-5° (0-9 %) Vegetation form sedum Water retention 50 % Discharge coefficient Cs =0.01 ** Discharge yield *** 3 l/s x ha Water storage ca. 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 Cs = 0.1. Cs = 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
- Alternative: wildflower-based vegetation mats or plug planting
- Download Data Sheet
OPTIGREEN EXTENSIVE SUBSTRATE E
(60 MM) *
- A substrate with high water storage capacity and good air porosity, tailored to extensive multi layer systems
- Download Data Sheet
OPTIGREEN COMBI INSPECTION CHAMBER TKS PLUS (NOT SHOWN IN THE DRAWING)
- Simple control of roof drainage outlets
- Extendable in 100 mm increments
- Side and top drainage openings
- Download Data Sheet
OPTIGREEN FILTER FLEECE FIL 105
- Prevents fine particles from forming sludge in the drainage layer; high water permeability.
- Download Data Sheet
Optigreen Meander Water Retention Board FKM 30 (30 mm)
- Delays discharge of surplus water
- Prevents accumulation of water
- Lighter build-up with better drainage performance
- Temporary water storage only
- Download Data Sheet
OPTIGREEN PROTECTION AND STORAGE FLEECE RMS 300
- Protects the roof membrane against damage and stores water.
- For inverted roofs, use the Optigreen Trickle Protection Fleece RSV 120 instead of the RMS Fleece.
- Download Data Sheet RMS 300
- Download Data Sheet RSV 120
