Perrau’s most recent award winning building is designed entirely out of corrugated iron, similar to what the fishermen live in in Reunion, but with a twist – this corrugated iron repels heat by reflecting sunlight with an external foil layer and an inner insulating layer of non heat conducting material. The house has a unique ultra simple yet high tech aesthetic. This year energy efficiency in buildings standard SANS 204 becomes mandatory – its technical terms and performance levels are not dissimilar to those pursued by Perrau and his contemporaries in Reunion Island. Share his insights during Module 3 – Energy Efficiency in Buildings at the Green Building Conference 2012.