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Line 27: [[File:Layers green roof.PNG|thumb|left|400px|Generalized cross-section view of a green roof showing key components and common layers that make up this LID BMP (TRCA, 2018)<ref name="example1" />]]
→Component description
=Component description=
=Component description=
[[File:Layers green roof.PNG|thumb|left|200px|Generalized cross-section view of a green roof showing key components and common layers that make up this LID BMP (TRCA, 2018)<ref name="example1" />]]
*Vegetation free zone: separates the green roof perimeter from the roof perimeter and other structures on the roof (e.g., vents), that is kept devoid of vegetation and natural debris.
*Vegetation free zone: separates the green roof perimeter from the roof perimeter and other structures on the roof (e.g., vents), that is kept devoid of vegetation and natural debris.
*Root barrier: often a clear plastic sheet, the root barrier layer protects the water-proofing membrane from root penetration and degradation by microbial activity.
*Root barrier: often a clear plastic sheet, the root barrier layer protects the water-proofing membrane from root penetration and degradation by microbial activity.
*Irrigation System (if applicable): Most green roofs will require periodic irrigation, especially during the first 2 months of the establishment period. See the page on [[Green roofs|green roofs]] for additional information on irrigation systems.
*Irrigation System (if applicable): Most green roofs will require periodic irrigation, especially during the first 2 months of the establishment period. See the page on [[Green roofs|green roofs]] for additional information on irrigation systems.
*Leak detection system (if applicable): leak detection systems should be used to periodically check for the presence of leaks in the water-proofing membrane. See the page on [[Green roofs|green roofs]] for additional information on leak detection systems.
*Leak detection system (if applicable): leak detection systems should be used to periodically check for the presence of leaks in the water-proofing membrane. See the page on [[Green roofs|green roofs]] for additional information on leak detection systems.
[[File:Toronto City Hall Podium green roof by LiveRoof, July 2010.jpg|400px|thumb|right|Toronto_City_Hall_Podium_green_roof_by_LiveRoof,_July_2010]]
[[File:Toronto City Hall Podium green roof by LiveRoof, July 2010.jpg|400px|thumb|right|Toronto_City_Hall_Podium_green_roof_by_LiveRoof,_July_2010]]