Blue Roof Drain

The idea behind this is that instead of water from a storm going into the sewers and reservoirs at once causing flooding the water is released gradually at a controlled rate.

Blue roof drain.

Roof level sustainable drainage system. A blue roof is a roof designed for the retention of rainwater above the waterproofing element of the roof. The 6 inch depth is equivalent to ds dh defined in asce 7 10 chapter 8. Inlet of secondary drain on a blue roof to 6 inches.

Blücher blue roof drain is a range of rainwater outlets and accessories. The design of the overflow structure must be sufficient to provide safe stable discharge of stormwater in the event of an overflow. Ds is the difference in height on the undeflected roof up to the. A blue roof is different from a traditional roof in the respect that most roofing systems are designed to repel water whereas a blue roof is designed to retain it.

Safety all blue roofs must be designed to safely convey system overflows to downstream drainage systems. A radmat blue roof system is an effective means of providing a sustainable drainage solution suds in inner city and urban environments in compliance with the requirements of the 2019 draft london plan. The bauderblue roof system is a sustainable drainage method designed to attenuate and manage stormwater on a flat roof over a 24 hour period via a restrictive flow outlet. The blue roof drains can be used for all types of flat roofs with bitumen are equipped with a pre drilled standing pipe allowing excess water to flow unrestrictedly into the public sewage system.

In simple terms a standard flat roof is designed to drain quickly in the worst case event a short intense summer storm lasting minutes whereas a blue green roof is designed to drain slowly to mitigate the effects of downstream flooding that can be a duration of hours. Currently some jurisdictions limit the maximum depth of retained water e g. All blue roof systems must drain within 72 hours. This is as opposed to more conventional roofs which allow for rainwater to drain from the roof.

Six inches of rain weighs approximately 32 pounds per square foot psf. Blue roofs or rooftop detention the temporary storage of stormwater to control discharge rates and allow for sedimentation is a popular stormwater management option for flat roof buildings particularly within the industrial commercial and institutional ici sector the appeal is the relatively low cost and simplicity of modelling and forecasting performance. Blue roofs are typically flat without any fall with control devices regulate drainage outlets that enable water to be retained or drained.