Blue Roof System Summaries 

Best practice requires all blue roof voids to be covered. The lowest cost solution is to lay pebble ballast above the blue roof void layer (RWR 100 attenuation cell). Rain water can then accumulate in the void whilst the ST or SR blue roof flow restrictor (fitted at each outlet) allows precise control of the roofs discharge rate and enable large volumes of water to be attenuated at roof level.

Intensive landscapes are often specified above blue roofs, the landscaped areas will naturally delay and reduce rain water runoff, this combined with the blue roof void (RWR 100 blue roof attenuation cell) and ST or SR blue roof flow restrictors allows precise control of the roofs discharge rate and enable large volumes of water to be attenuated at roof level.

This specific type of biodiverse (or brown roof) is designed to incorporate as many types of habitat as possible giving a home and food source to invertebrates and pollinators which in turn are food for many birds and bat species. The roof is typically sown or plug planted with a broad range of plant species.

Green roofs are an ideal partner for blue roofs as they will naturally delay and reduce rain water run-off from the roof. When combined with the blue roof system (RWR 100 blue roof attenuation cell) and ST or SR flow restrictors allow the precise control of the roofs discharge rate and enable large volumes of water to be attenuated at roof level.

Hybrid system that utilises the water storage capacity of a green roof build up. The SUB-RE UK layer and RE 40 board act with the flow restrictor to carefully control water discharge off the roof. The system benefits the vegetation as typical substrate depths are greater allowing deeper rooting and using a substrate to hold the rainwater reduces the amount of plastic within the build-up by 84% compared to the BauderBLUE STORMcell system.

BauderBLUE STORMvoid is a simple blue roof solution with paving or decking finish. The Bauder pedestal system forms a void that can be used to attenuate water and incorporates the BauderBLUE ST adjustable flow restrictor to give precise discharge rates from the roof. The system can use any of the Bauder pedestal systems: Slope Correcting (DPH) Pedestal; Non-Combustible (NC) Pedestal; or Adjustable (PB) Pedestal.