These professional guidelines from the French Program RAGE 2012 concern double walls with outdoor thermal insulation.

More and more French buildings use the double wall technique: the inside wall is the bearing wall, the outside wall with its siding brings aesthetics while protecting the thermal insulation placed between the two walls.

These professional guidelines cover new construction and renovation. They are a complement to the french standard NF DTU 20.1. They describe the double wall design and construction and provide details of the implementation to the main singular points. They also give consistent constructive arrangements with seismic regulations for use of double walls in areas subject to seismic hazards.