Understanding the new rules in France on house construction As of January 2013 all house builders are facing a new challenge: the RT 2012. There is a lot of confusion about the new rules with everybody having his own interpretation of the law. But most of the basics are not that complicated. This article tries to explain the basics. About the law According to our Minister of “l’Ecologie, de l’Energie, du Développement durable et de la Mer” (Ecology, Energy, Sustainable Development and Sea), the role of the state is to set objectives.