Changes

[[File:Pass Filter Bed green roof.PNG|400px|thumb|right|Fully constructed green roof.]]

[[File:Pass Filter Bed green roof.PNG|400px|thumb|right|Fully constructed green roof.]]

=Overview=

=Overview=

[[Green roofs]] are composed of several layers (waterproof membrane or existing membrane, root barrier, drainage layer, filter fabric, growing medium) that support the growth of plants and other vegetation on top of a roof. The proper installation of green roofs can help to achieve water balance targets, promote biodiversity and provide green space.

[[Green roofs]] are composed of several layers (waterproof membrane or existing membrane, root barrier, drainage layer, filter fabric, growing medium) that support the growth of plants and other vegetation on top of a roof. Growing medium depth determines which plants can be planted, and the components of green roofs can either be loose-laid or fused together. The proper installation of green roofs can help to achieve water balance targets, promote biodiversity and provide green space.

[[file:GRalllayers.JPG|400px|thumb|right|Layered system green roof with all component layers showing. A key benefit of green roofs is  (Photo source: CVC)]]

[[file:GRalllayers.JPG|400px|thumb|right|Layered system green roof with all component layers showing. A key benefit of green roofs is  (Photo source: CVC)]]