Stormwater Management Roof

  • Extensive green roof during heavy rainfall

Water Retention with Blue Roofs – Meet the Increasing Need for “Stormwater Management Roofs” Due to Climate Change

Why a “Stormwater Management Roof?”

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

Water storage in a standard green roof build-up, however,  cannot be increased arbitrarily because more water could result in changes to the vegetation used. That’s where blue roofs come into play. The ZinCo build-up “Stormwater Management Roof” offers this option of a substantial rainwater storage in addition to all the other beneficial features of a green roof build-up.

Special Features of a “Stormwater Management Roof”

Up to approx. 80 l/m² of precipitation can be retained with a “Stormwater Management Roof” and then released into the sewerage system over a pre-defined period of time (between 24 hours and a few days). The space required for the increased precipitation is created by a grid spacer or spacer element situated beneath the actual green roof build-up.

Meanwhile, the elements (water storage for the plants, air-water household in the root area etc.) that are of vital importance for the proper functioning of the green roof are all preserved.

Virtually all types of roof utilisation are possible above the stormwater retention 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 retention capacity ca. 80 l/m²

Green Roof 4.0

Overview of our most recent system build-up innovations counteracting the effects of urbanisation and climate change.

Number of pages
16 pages
Date of publication
Jun 2018
System Specifications
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.