CWA 17890:2022

Guide to the implementation of cool surfaces for buildings’ envelope to mitigate the Urban Heat Island effects

Scope

The document provides the terminology relating to cool materials and a guide to the implementation of cool surfaces for building envelopes to mitigate the urban overheating effects. It concentrates on the application to roofs.
The document will focus on urban areas for local authorities and building/construction owners.
The users of CWA 17890:2022 will be local authorities, urban planners for cities including construction, infrastructures and landscape architects.
In addition, the terminology and characteristics of cool materials will serve as a reference for other applications where the use of cool materials will have a significant contribution to adaptation to climate change as well as quality of life, such as for roads and pavements.
Whilst reflective surfaces can be very beneficial, they are not appropriate or effective in all climates for all buildings or building constructions and some guidance is provided.