Blue Roof, Green Extensive, Rathbone Market, London, UK

The designer obtained consent under the latest SuDS regulations in the densely build area of London. Restriction on outflow rates to sewers demanded high attenuation. The original design for stormwater attenuation involved discharging tanks under the ground. This was expensive and took up valuable space, an alternative was required. ABG proposed their Blueroof system which could be installed directly on to the hot melt waterproofing system allowing various surface finishes. Due to height limitations a cascade system was used. Various roof finishes included paved access, landscaped areas and bio diverse to attract wildlife. This increased the potential for BREEAM points.