Stormwater Management Roof

  • Green roof during heavy rainfall

Meet the Increasing Need for “Stormwater Management Roofs” Due to Climate Change

Changing weather conditions (e.g. extreme local rain events) can result in an entire public sewer system being overwhelmed. One of the great benefits of a green roof is that it detains water and allows for a delayed run-off of stormwater.

Water storage in a standard green roof build-up cannot be increased arbitrarily because more water could result in changes to the vegetation used. However, this is possible with a suitable system which offers an increased water storage in addition to all the other features of a green roof build-up.

The required space for the detention of the increased precipitation is created by traditional drainage element with adequately dimensioned water retaining troughs or a grid spacer element. The conditions that are of vital importance for the proper functioning of the green roof (water storage for the plants, air-water household in the root area, etc.) are preserved.

Virtually all types of roof utilization are possible above the stormwater detention space, once structurally permitted, from an extensive green roof to a roof garden with pathways and driveways.

 

 

Technical Data
Build-up height ca. 150 mm
Weight, saturated ca. 155 kg/m²
Water storage capacity ca. 80 l/m²
Specification Suggestions
System build-up

Diagram

Products

Grafik des Systemaufbaus
Sedum Mats or Sedum Plug Plants
System Substrate “Sedum Carpet”
Filter Sheet SF
Floradrain® FD 25-E
Filter Sheet PV
Retention Spacer RS 60
Filter Sheet PV

Product Details

Sedum Mats or Sedum Plug Plants

System Substrate “Sedum Carpet”

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System Substrate for extensive green roofs in single- or multiple layer build-up.

Filter Sheet SF

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Geotextile of thermally strengthened polypropylene, applicable as filter sheet above drainage elements for normal mechanical stress.

Floradrain® FD 25-E

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Pressure resistant drainage and water storage element of recycled polyolefin for use on extensive green roofs.

Filter Sheet PV

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Thermally strengthened filter sheet of PP, highly resistant to mechanical stress, applicable especially on Elastodrain® EL 202 and Protectodrain® PD 250 under driveways.

Retention Spacer RS 60

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Powerful and highly transportation friendly Spacer Element made of profiled plastic for its use in Stormwater Management Roofs on roof surfaces without inclination.

Filter Sheet PV

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Thermally strengthened filter sheet of PP, highly resistant to mechanical stress, applicable especially on Elastodrain® EL 202 and Protectodrain® PD 250 under driveways.

No product information available

Note

The system solution shown relates to the green roof build-up in particular. The roof construction itself is only shown schematically and must be planned and executed according to specialist rules for waterproofed roofs.