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Retention Roof - Extensive

Verified by manufacturer 18 days ago

Meander FKM 30

Optigreen Ltd Variant:

Retention roofs for intelligent rainwater management.

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+44 (0)203 5899404 Website

Application

For extensive green roofs.

Description

With the retention roof systems, green roofs and intelligent rainwater management work together effectively and sustainably. For a better microclimate and in line with the concept of the sponge city. Optigrün offer effective solutions for delaying runoff and complying with discharge restrictions or throttled runoff from the green roof.


Features and benefits:

Retention Roof Meander FKM 30:

  • Greatly reduced drainage peaks.
  • For extensive green roof structures.

Retention Roof Meander FKM 60:

  • Greatly reduced drainage peaks.
  • Long-term water storage (meander 60).
  • For extensive and semi-intensive green roof structures.

Retention Roof Flow Control Extensive:

  • Very low outflow rate, thanks to a specifically adjusted flow control unit.
  • High retention volume in the WRB 80F approx. 75 l/m².
  • Lightweight thanks to hollow-body drainage unit (Water Retention Box WRB).
  • High evaporation capacity thanks to integrated capillary system.
  • Basic prerequisite: 0° roof.
  • Suitable for inverted roofs.

General information

Color

Green

Brown

Black

Finish

Natural

Material

Vegetation

Acrylonitrile butadiene styrene (ABS)

Plastic

Shape

Square

Rectangle

Other

Length

Bespoke

Width

Bespoke

Height

Bespoke

Uniclass

Ss_45_40_47_28 Extensive green roof systemsPrimary
Ss_45_40_47_75 Semi-intensive green roof systems

CAWS

Q37/120 Simple intensive green roof

Q37/130 Extensive green roof

Specification data - Extensive green roof systems

Protection

-

Protection layer

Protection and storage fleece RMS 300.

Guidance for specification option:

  • Strength class: GRK 2.
  • Thickness: approx. 3.6 mm.
  • Weight: 300 g/m².
  • Water storage: approx. 2 l/m².
  • Roll: 100 m².
  • Roll width: 2.0 m.
  • Sound reduction ∆LW: 35 dB.

Moisture control

-

Drainage layer

Meander and water retention board FKM 30.

Guidance for specification option:

  • Nominal thickness: 40 mm.
  • Weight: approx. 1.7 kg/m².
  • Retention volume: 0 l/m² continuously; approx. 19 l/m² temporarily.
  • Maximum flow capacity: approx. 0.23 l/m×s (with 2% slope).
  • Compression strength: approx. 115 kN/m² as per EN ISO 25619-2.

Filter membrane

Filter fleece FIL 105.

Guidance for specification option:

  • Strength class: GRK 2.
  • Thickness: approx. 1.1 mm.
  • Weight: 105 g/m².
  • Roll: 200 m².
  • Roll width: 2.0 m.

Drainage ancillaries

Combi inspection chamber TKS PLUS.

Guidance for specification option:

  • Material: recycled plastic (ABS).
  • Chamber cross section: 370 × 370 mm.
  • Floor support surface: 470 × 470 mm.
  • Height: 110 mm minimum (stackable in 100 mm increments); 800 mm maximum.
  • Chamber bottom opening: Ø300 mm.

Planting systems

-

Planting medium

Extensive substrate E (60 mm).

Planting requirements

Pre-cultivated sedum mat with decomposable carrier.

Plug planting.

Wildflower-based vegetation mats.

Fire breaks

-

Manufacturer guidance

Consult manufacturer for details and insert requirements or omit.

Edge restraints

-

Manufacturer guidance

Consult manufacturer and insert requirements.

  • Erosion protection plates ESP in pebble boarders.
  • Vegetation mats on green spaces.

Weight

90 kg/m² (0.9 kN/m²).

System depth

From 90 mm.

Manufacturer guidance

Build-up depth.

Roof pitch

0–5°.

Discharge

Cs = 0.01.

Manufacturer guidance

Discharge coefficient.

System accessories

-

Manufacturer guidance

System add-ons available.

Consult manufacturer for details and insert requirements.

Sustainability data

Country of material origin

Europe

Country of product manufacture

Europe

Material

Vegetation

Acrylonitrile butadiene styrene (ABS)

Plastic

Recycled content

As defined in clause 7.8 of BS EN ISO 14021

-

Manufacturer guidance

RMS 300

- 100% recycled plastic fibre (PP/PES/acrylic)


FKM 30

- 100% recycled HDPE

Literature

Optigrün Technical Brochure

Optigrün Technical Brochure

Optigrün Retention Roof - Flow Control

Optigrün Retention Roof - Flow Control

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