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→Component description
=Component description=
=Component description=
[[File:Layers green roof.PNG|thumb|right|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" />]]
[[File:Layers green roof.PNG|thumb|right|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"> TRCA. 2018. Fact Sheet - Inspection and Maintenance of Stormwater Best Management Practices: Green Roofs. https://sustainabletechnologies.ca/app/uploads/2018/02/Green-Roofs-Fact-Sheet.pdf</ref>]]
[[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)]]
*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.