Overshading, Glare and Reflection Studies

With the increase in use of reflective glass in curtain walls of high-rise buildings, concerns have been raised regarding overshadowing and reflectivity. Various planning authorities have enacted regulations to control the impact of shading at ground level and limit the use of reflective facades.


For this purpose, Vipac has developed SHADE; a highly specialised computer software program specifically for quantifying environmental impact and in determining the impact of reflections from proposed building developments and the surrounding carriageways and pedestrian pathways.

SHADE uses Vipac’s extensive database of buildings and topography of Australia’s main cities along with calculations of sun positions to determine minute-by-minute variations of shadow locations at any time of the year.

Building Reflectivity

Reflectivity assessments determine the adverse reflective glare from glass surfaces, which can impact on motorists, pedestrians, and neighbouring buildings. Conducted as part of a development approval, reflectivity studies are equally important in ensuring maintenance of nearby public spaces as well as assessing the aesthetics of the development for different glazing designs.

Vipac has been involved in numerous shading and reflectivity assessments, helping architects in planning public amenity spaces, supporting developers during statutory planning processes and for councils in determining the impact of proposed towers in regards to the existing city shadows.