I'm going to the green roof symposium tomorrow downtown to get some questions answered, but from what I know already about green roofs, there are different ones- some shallow, some deeper and they have a membrane that actually protects the roof so that it lasts 3 times longer. Also, the temperature of the roof stays cooler than a painted black(or white) roof does by a long shot- esp. on a very hot summer day. A black roof can get to 165 degrees and green roof stays at about the surrounding air temp. It saves a lot of energy! Plus the solar panels create it, so it really helps when you multiply the number on rooftops. We are trying to fight global climate change and the massive footprint we are having, so this is actually just a drop in the bucket of what we should be doing!

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