It is a hybrid method for the construction of blocks of floors, in which the humid parts, baths and kitchens are realized by three-dimensional modules, whereas the bedrooms, lounge … it concludes in work. This system has been designed by the study Artefacto Arquitectos, placed in Madrid, allows to pile up in work the modules constructed before being accessible and extendable at any time. With this system the costs get cheaper in 10 % and 30 % diminishes the period.