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Are Green Roofs True Stormwater Management Tools? - Part 1
An audio article by Oscar Warmerdam.

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Green roofs are often sold as stormwater management tools. And that is true: green roofs do manage stormwater but mostly as a volume reduction tool. This volume reduction has huge benefits on a city scale. The benefactors are the taxpayers, citizens of what is now a city with cleaner water, and cleaner air.

This is why many progressive cities have regulations in place that promote green roofs.

But, if that’s the case… If green roofs are an excellent volume reduction tool on a city scale, why don’t civil engineers put one on top of every roof they can? The answer is simple but will be a surprise to most: most green roofs do not detain water well enough. Let us explain.
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Read the article here:
www.purple-roof.com/post/green-roof…anagement-tools

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