This building has the largest Cool Roof in France. The most innovative aspect of the renovation is the application of thermal reflective paint on the roof.
A white roof reflects about 85% of the sunlight that reaches it and heats up a few degrees more than the outside air temperature. On the other hand, a black roof can heat up to over 80 ° C.
It is therefore a simple and effective solution to improve comfort, limit air conditioning expenses.
The strong points of a cool roof:
NB: The RTex, RT2012 and LEED certification include in their calculation the solar absorption of horizontal walls. Coolroofing is widely used in the USA but very little used in Europe.