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Green roofs provide many benefits, e.g. storm water runoff reduction; increase insulation properties; reduce heat island effect through evapotranspiration. Although more and more new real estate have a (mandatory) green roof, many old roofs in urban areas remain with a classic roof, as green roofs are heavy systems, not easy to install and relatively expensive.
Developed by De Boer Green
To lower threshold for consumers and to accelerate the transition to more green roofs in historic urban areas, we offer a lightweight, easy-to-install green roof system that is cheaper than current extensive green roof build-ups, by
1) using cost effective build-up materials and
2) saving money on transportation and installation cost (even suitable for DIY).
See more information about this level and the TRL and SRL levels.
The product is an extensive green roof system which consists of a Drainage layer; Growing medium; Composite Seed blanket and Ballast. Apart from the ballast, all layers of the system are sheets or blankets rolls. All materials are dry, and can be stored for a long period. The seed blanket is an unvegetated composite, which contains a sedum seed mixture that can be customized to withstand different climatological conditions. This allows potential use across Europe. By using geotextile as growing medium, additional substrate is not required. With a weight of ±53kg/m² the system is very lightweight compared to standard extensive green roofs(>100kg/m²). Current system retains 25L/m², which can easily be increased using alternative geotextiles.
Limitations/conditions under which this innovation does not work or is less effective
After installation irrigation is required, to ensure germination.
Added value
Difference in build-up components: The layers come as rolls, simplifying installation by only cutting to the right dimensions. This, and being lightweight & compact, transport and installation costs are reduced. Product can be marketed as modular systems, making green roofs more accessible, even for the DIY market. Reaching more consumer groups and making them more affordable, we believe that we can dramatically accelerate the coverage of green roofs in urban area, which will help to counter effects of climate change, e.g. reducing stormwater run off, heat island effect.
Green roofs provide many benefits, e.g. storm water runoff reduction; increase insulation properties; reduce heat island effect through evapotranspiration. Although more and more new real estate have a (mandatory) green roof, many old roofs in urban areas remain with a classic roof, as green roofs are heavy systems, not easy to install and relatively expensive.
Developed by De Boer Green
To lower threshold for consumers and to accelerate the transition to more green roofs in historic urban areas, we offer a lightweight, easy-to-install green roof system that is cheaper than current extensive green roof build-ups, by
1) using cost effective build-up materials and
2) saving money on transportation and installation cost (even suitable for DIY).
The main components of the system have been tested separately, and an initial integration exercise has been conducted.
The product is an extensive green roof system which consists of a Drainage layer; Growing medium; Composite Seed blanket and Ballast. Apart from the ballast, all layers of the system are sheets or blankets rolls. All materials are dry, and can be stored for a long period. The seed blanket is an unvegetated composite, which contains a sedum seed mixture that can be customized to withstand different climatological conditions. This allows potential use across Europe. By using geotextile as growing medium, additional substrate is not required. With a weight of ±53kg/m² the system is very lightweight compared to standard extensive green roofs(>100kg/m²). Current system retains 25L/m², which can easily be increased using alternative geotextiles.
Limitations/conditions under which this innovation does not work or is less effective
After installation irrigation is required, to ensure germination.
Added value
Difference in build-up components: The layers come as rolls, simplifying installation by only cutting to the right dimensions. This, and being lightweight & compact, transport and installation costs are reduced. Product can be marketed as modular systems, making green roofs more accessible, even for the DIY market. Reaching more consumer groups and making them more affordable, we believe that we can dramatically accelerate the coverage of green roofs in urban area, which will help to counter effects of climate change, e.g. reducing stormwater run off, heat island effect.
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