Blue roofs. A guide to implementation

A blue roof provides the attenuation and management of rainfall at its source. They are becoming a common approach to manage local flood risk, particularly in dense urban environments where space is at a premium. This guide will be of interest to all those involved with buildings, including construction professionals, clients, planners, maintenance professionals and end-users. Guidance is given on the wider background and planning considerations for blue roofs through a step-by-step approach on the detailed hydraulic calculations required for their effective design.