The vast majority of new buildings employ facades with fixed state performances that do not allow the prevailing weather conditions to beneficially affect energy performance. Much in the same way that one may remove a coat on a hot day, buildings should have the ability to regulate their insulation performance, daylight penetration and G value to minimise energy use. The application of such technologies is a new science and understanding what represents a particular best fit is dependent upon a number of factors including the building use, geography, latitude, size and orientation. As part of an ongoing PhD research project with Cambridge University, Wintech are able to provide supporting façade engineering consultancy services that help inform this new branch of façade engineering.