A Blue Roof is a Happy Roof

For a good future we need to respect water at its source and in our built environments. You have heard of a green roof, a white roof, and now we have a blue roof. These roofs all have the same ultimate goal in mind: do less harm to (or maybe even better) their local environment. Blue roofs focus on water management and therefore a best located near wetlands and shores. Blue roof can regulate water runoff on to into lakes and streams while protecting sewer systems from being overwhelmed.

“With climate change, you won’t get the same amount of precipitation but you get it in a shorter duration in bigger, shorter storms,” Taylor said. “If you get water faster than you designed for, then it fills up and it starts backing up and you get flooding. And flooding is very expensive wherever that occurs.”

A blue roof system stores rainwater and slowly releases it using flow-control devices or structures, from customized trays to existing building risers that cause water to dam up. Together, they act as a temporary sponge, collecting and then releasing the water over time.

The stored water also provides the building with a cooling effect through evaporation, as well as additional water for reuse.

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