50
Structural Design
through the development of the cross-section. A sketch of the roof-plan view, or bird’s eye view, of the green roof is also necessary. Through the roof plan the plant layout is developed, the various features are identified, and the construction process is organized. (See Figs. 2.5 through 2.9)
Non-combustible “no vegetation” zone (18 inches wide at perimeter) Growth media retainer Green roof plants Engineered growth media Drain core / root barrier composite Insulation board Metal roof decking
Figure 2.5
Typical cross section built-in-place green roof.
Concrete pavers at parimeter Green roof plants Green roof modules Roofing membrane Insulation board Metal roof decking
Figure 2.6
Figure 2.7
Typical cross section modular green roof.
Roof plan simple modular roof.