{{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.]]
==Overview==
==Overview==
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[[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.]]
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.
Green roofs are sometimes referred to as 'ecoroofs', 'vegetated roofs', 'living roofs'.
Green roofs are sometimes referred to as 'ecoroofs', 'vegetated roofs', 'living roofs'.