Green buildings must use materials with a positive impact on the human being and environment while ensuring a high degree of thermal insulation. The structure of the exterior wall proposed by the authors was designed to meet as many requirements as possible: to have good insulating properties and a proper behavior to the diffusion of vapors, to comply with the requirements imposed by regulations regarding the thermal stability of the construction elements, to use environmentally friendly materials and also to have a light weight so that it can be prefabricated or used in modular constructions that require transport and manipulation.