Optigrün Retention Roof Meander FKM 30

For extensive green roofs where a very low peak runoff coefficient is required, the RETENTION ROOF MEANDER FKM 30 is particularly suitable. With the Meander FKM 30 drainage element, the rainwater has to cover a longer flow path and is also throttled at the outlet. This ensures a significant reduction in the peak discharge coefficient.

The RETENTION ROOF MEANDER FKM 30 is an economical and efficient system for delaying runoff. The inexpensive and flat system structure is particularly interesting for large industrial roofs, for example, where it is often necessary to comply with certain discharge restrictions. The sedum vegetation we recommend is robust and requires little maintenance. This also contributes to the cost-effectiveness of this green roof system.

The RETENTION ROOF MEANDER FKM 30 is an impact mitigation measure within the framework of the impact compensation regulation. It meets the requirements of the FLL Green Roof Guidelines.

Ecological value
Maintenance costs
Costs*	from 28 €/m2

Meanders are natural river formations that result from the turbulence of water. Instead of moving exclusively along the actual current, the river forms small whirlpools that grind the bank in a round shape against the actual direction of flow. Over time, S-loops are formed in which the water moves. This increases the flow length and reduces the flow velocity.

Good green roof design is close to nature: in retention roof construction, the meander shape of the water and retention elements allows the water to be drained away more slowly. Thanks to the S-loops, the water never flows in a straight line, but on winding detours, which effectively reduces runoff peaks.