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=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"> 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: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.
*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.
=Key inspection points=
=Key inspection points=
[[file:GRMatstorage.JPG|400px|thumb|right|Storage of green roof materials (Photo Source: CVC)]]
[[file:GRMatstorage.jpg|400px|thumb|right|Storage of green roof materials (Photo Source: CVC)]]
Construction inspections take place during several points in the construction sequence, specific to the type of LID BMP, but at a minimum should be done weekly and include the following:
Construction inspections take place during several points in the construction sequence, specific to the type of LID BMP, but at a minimum should be done weekly and include the following:
#During site preparation, prior to BMP installation to ensure the roof structure is ready for green roof construction work and confirm that BMP layout area matches approved design drawings and that construction materials meet design specifications;
#During site preparation, prior to BMP installation to ensure the roof structure is ready for green roof construction work and confirm that BMP layout area matches approved design drawings and that construction materials meet design specifications;