Windtech Consultants Pty Ltd, Singapore
Reflective façade systems are becoming more common, whether for general aesthetics or as a form of reducing a building’s carbon footprint. However, without the appropriate controls, their use has often resulted in reflective glare, causing nuisance to the public, with some cases involving hazards or outright damage to public property, i.e. the “Walkie Talkie” (20 Fenchurch Street), London. The most common cause for concern has been the impact associated with visible light reflectance. However, there have been some notable cases where excessive thermal reflectance has been the main issue. In a bid to prevent these impacts, municipal authorities are tightening planning controls by limiting the reflective performance of all façade materials, and/or in some cases making it mandatory for building owners to commission reflectivity assessments as part of the development approval process.
This session presented some case studies illustrating the potential environmental impacts of visible light and thermal reflectance, focusing on how the building designer can incorporate the appropriate measures to eliminate potential impacts during the design stage, with far less cost implication to the building owner than addressing the problem after construction.