Sistema de fachada ventilada: Análises qualitativas na proteção térmica e de permeabilidade; e tipológicas na produção, materiais e ancoragens. Estudo de caso

Abstract

The Ventilated Facade System was initially developed in Europe from the search for thermal efficiency for buildings, reducing cooling and heating costs. Composed of an external coating layer, fixed away from the substrate, it can be supported by direct anchors or under an intermediate structure. The formed air layer promotes thermal insulation between the external and internal environments of the building. The ventilated system is characterized by the continuous air flow between the air chamber and the external environment, through the joints between the claddings and through the edges of the facade, providing air renewal due to the “chimney effect”. The ventilated system can be used in new works and/or renovations. As a versatile façade, it allows the application of diverse external cladding materials, anchors, intermediate structure and thermal insulators. Ventilated facades have technical and commercial advantages when compared to the bonded system. Among the advantages, the thermal and acoustic performance, low maintenance and high execution speed stand out. In order to present the characteristics of the system and encourage its use, it was proposed at the end of this work criteria for classification of the ventilated façade system regarding the typology of the materials used and the quality in relation to the levels of thermal and permeability protection, directed for construction professionals and interested parties.