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LANDSCAPING & EXTERNAL WORKS
solutions
Discover green
Grasscrete; roadside verge
Grasscrete; water attenuation
A key benefit is green roofs’ moisture- retention quality, enabling time-delayed run-off of excess water
Grasscrete; fire access
Grassblock; off road parking
Betoconcept; earth retaining plantable walls
overlying substrate layer. This substrate layer is composed of mineral and organic materials specifically adapted to suit the planned vegetation. The plants provide the final layer.
Attention to pitched roofs
Grasscrete; roadside parking
Grass Concrete Limited is a world leader in the development and supply of ‘green’ construction solutions. Expert environmental systems for over 45 years, we are still committed to our environment and the creation of greenspace.
Grass Concrete Limited
Duncan House, 142 Thornes Lane, Thornes, Wakefield, West Yorkshire WF2 7RE England
Tel: +44(0)1924 379443 Fax: +44(0)1924 290289
Innovative environmental solutions
www.grasscrete.com WWW.ARCHITECTSDATAFILE.CO.UK
Pitched green roofs require extra scrutiny from installers due to a number of requirements. Shear forces have to be transferred into stable eaves edges and additional shear barriers may have to be installed to prevent the green roof build-up from sliding. In addi- tion, specialised drainage boards need to be used to help retain the soil substrate, substrate layers need to be increased and additional irrigation might be necessary. Then there is the question of mainte- nance – the right selection of plants has to be taken into account from the beginning. To meet these requirements for pitched green roofs, professional planning and execution is essential while the use of tested and proven pitched green roof system build-ups is indispensable.
Advanced water retention
As mentioned previously, water retention is one of the major bene- fits of a green roof. However, water storage in a standard green roof build-up cannot be increased arbitrarily, since more water could result in changes to the vegetation. For this reason, and to counteract the increase in heavy rain events as a result of climate change and the consistently high level of soil sealing, so called storm water management roofs have been introduced to the market.
Due to an extra layer of spacer elements underneath the stan- dard green roof build-up, the storm water retention capacity can be increased by a multiple. This means water can be stored for a prolonged period of time, from 24 hours up to a few days, and reused in intelligent ways.
Fabian Kaiser is director of rooftop landscaping specialist ZinCo Green Roof Systems
ADF FEBRUARY 2017
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