31 Aug '14, 4pm

New Study Shows White Roofs are Three Times More Effective than Green Roofs at Fighting Climate Change

I like vegetated roofs but don’t consider them very “green” other than their natural color. If you are where you could collect and reuse the water that falls on the roof, a green roof won’t give up hardly any of it. And if you have a dry spell you can end up using a lot of water to keep the plants alive. It requires a lot more structural strength to hold up dirt and I don’t see anyone calculation the impact of the additional building materials. Lastly dirt is not an insulator so you still need about the same amount of insulation below it. I’m not opposed to vegetated roofs but look at all aspects when making comparisons. The Building Science Corporation has an article at their website on why they consider the “green” aspect of them to be hypocrisy but discuss what they consider the real benefits (they like green roofs too).

Full article: http://inhabitat.com/new-study-shows-white-roofs-are-thre...

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