[Greenbuilding] Green Roof under deck

[David Wentling]

Green roof are for storm water control, reducing heat islands, aesthetics, and protect roofing materials from UV exposure. Side benefit is reducing the temperature gradient across the roof which effects indoor comfort. Lets be clear, we do not construct green roofs for keeping buildings cooler. There are more cost efficient ways to do that.
 

David Wentling
ConservFirst.com



________________________________
 From: Beatrice Dohrn <beatricedohrn at yahoo.com>


Isn't the main point of a green roof to keep the house underneath cool?  So if the deck were of an opaque material with that 2' airspace wouldn't the deck the roof cool -- obviating the need for the vegetation?  
 From: Gennaro Brooks-Church - Eco Brooklyn <info at ecobrooklyn.com>


I just salveged some tempered glass. I have a client who wants me to
build a 3" green roof on his brownstone plus a deck that sits 2' above
the roof.
I suggested a glass deck and green roof under it.
He is concerned the vegetation under the glass deck will not survive
since it will bake in the summer.
Are there any experienced landscapers on this list who can offer their
experience? 
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