The thesis concerns the appropriation of breathing and selective permeability principles of materials applied in the construction of our houses, departing from the usage of fibersoil. The fibersoil technique, derived from constructive knowledge of the country that usually adopts raw clay, is investigated in a series of experiments intending to promote an interaction between this traditional know-how and the occupation of urban spaces. From this framework, the enhancement of the process, based on the methodology developed in PUC-Rios LILD - Laboratory of Investigation in Living Design, establishes a perspective of sustainable usage adequate to the citys housing conditions.