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RETENTION ROOF MEANDER FKM 30

Referenzobjekt Retentionsdach Wasserwerke Bochum
  • 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
Ecological value
Maintenance costs    
Referenzobjekt Retentionsdach Wasserwerke Bochum
Weight * 90 kg/m² or 0.9 KN/m²
Build-up depth 90 mm
Roof pitch 0 - 5°
Vegetation form sedum-moss
Discharge coefficient ** Cs = 0,1
Water storage approx. 19 l/m²
Discharge yield *** approx. 30 l/s x ha

* 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.
*** etermined according to FLL discharge coefficient measurements using a 15-minute reference rainfall r(15) = 300 l/s x ha.

PERENNIAL PLANTS AND/OR OPTIGREEN SEED MIX EKR AND SEDUM SHOOTS

Proven and specially-balanced seed mix consisting of a wide range of herbs and grasses (as desired) as well as numerous types of sedum shoots
Perennials in roof substrate pre-cultivated

Productdetails:
Sedum Shoots
Seed Mix EKR

EXTENSIVE SUBSTRATE E (60 MM)

[Translate to English:] Optigrün-Extensivsubstrat Typ E* (6 cm)

A substrate with high water storage capacity and good air porosity, tailored to extensive multi layer systems

Productdetails: Extensivse Substrate E

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

Productdetails: TKS Plus

FILTER FLEECE FIL 105

[Translate to English:] Optigrün-Filtervlies Typ 105

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

Productdetails: FIL 105

MEANDER WATER RETENTION BOARD FKM 30 (30 MM)

[Translate to English:] OPTIGRÜN-MÄANDERELEMEMT 30, PATENTIERT (3 CM)

Delays discharge of surplus water
Prevents accumulation of water
Lighter build-up with better drainage performance
Temporary water storage only

Productdetails: FKM 30

PROTECTION AND STORAGE FLEECE RMS 300

[Translate to English:] OPTIGRÜN- SCHUTZ- UND SPEICHERVLIES TYP 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.

Productdetails: RMS 300