4.7.3 Sizing

Sizing requirements for vegetated roofs will vary considerably depending upon the type of roof (e.g., extensive or intensive), structural loading requirements, roof size and drainage needs, etc. Consult a structural engineer for sizing the system for structural capacity, a drainage engineer for sizing drainage system components, a landscape architect for determining plant type, sizes, and spacing, and other qualified professionals as needed based on the site-specific application.


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