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{{TOClimit|2}}[[File:GRmodules.png|thumb|Example schematics of extensive green roofs. On the left, a 'built up' system comprising layers: roofing membrane, drainage board, geotextile, planting medium and sedum mat; and on the right a pre-planted plastic module or tray.]]
[[File:GRmodules.png|thumb|Example schematics of extensive green roofs. On the left, a 'built up' system comprising layers: roofing membrane, drainage board, geotextile, planting medium and sedum mat; and on the right a pre-planted plastic module or tray.]]
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==Overview==
==Overview==
Modern green roofs are a rapidly developing  commercial market in Ontario. Their primary benefit as a LID technology is in maximizing evapotranspiration for water balance targets.
Modern green roofs are a rapidly developing  commercial market in Ontario. Their primary benefit as a LID technology is in maximizing evapotranspiration for water balance targets.
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*Zero-lot line projects with outdoor amenity requirements,
*Zero-lot line projects with outdoor amenity requirements,
*Projects looking for accreditation with LEED v.4}}
*Projects looking for accreditation with LEED v.4}}


Extensive green roofs are the most commonly used  type of green roof used for stormwater in our region.
Extensive green roofs are the most commonly used  type of green roof used for stormwater in our region.

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