Technical guidance for blue roof construction and design has been released by the National Federation of Roofing Contractors.
The information was put together by the NFRC Joint Flat Roofing Technical Committee, and includes sections on drainage, roof deck construction, falls, waterproofing, outlets, overflows, components and finishes.
Kevin Taylor, Head of Technical Services at the National Federation of Roofing Contractors, said: “No British or European Standard covers this type of application so we were tasked with producing these notes to support the design of technically correct blue roof construction.
“We hope that this — like Green Roof Code of Practice (GRO) has done for green roofing — will provide comprehensive information and guidance for specifiers, designers and installers of blue roofs.”
A blue roof is a flat roof, designed to allow controlled attenuation of rainfall during heavy and storm events as part of a Sustainable Urban Drainage Systems (SuDS) good practice policy. It treats and releases the water at a managed and controlled rate directly into sewers, waterways and river systems.