Changes

[[File:Blue roof concept.jpg|thumb|Schematic of flow control valve type blue roof/ rooftop detention]]

[[File:Blue roof concept.jpg|thumb|Conceptual diagram of flow control drain cover type blue roof/ rooftop detention]]

==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.