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[[File:Blue roof concept.jpg|thumb|Conceptual diagram of flow control drain cover type blue roof/ rooftop detention]]
[[File:Blue roof concept.jpg|thumb|Conceptual diagram of flow control drain cover type blue roof/ rooftop detention]]
Blue roofs can be a very economical and low maintenance way to manage unwanted rainwater on a flat roof. For rooftop retention on moderately sloped roofs, a [[green roof] is going to perform better. On steeply sloped roofs, the best plan is going to be [[rainwater harvesting]], or some landscape integrated LID.
==Overview==
==Overview==
Blue roofs, or rooftop detention is a popular stormwater management option for many developments. The appeal is the relatively low cost and simplicity of modelling and forecasting performance.
Blue roofs, or rooftop detention is a popular stormwater management option for many developments. The appeal is the relatively low cost and simplicity of modelling and forecasting performance.