Il conflitto normativo tra le istanze energetica e della conservazione degli edifici storici non vincolati

The need to respond to global missions about the containment of energy losses has generated the promotion, at national level, of numerous tax incentives for the recovery of the built heritage. The race for funding has encouraged a sudden innovation of materials and new technological solutions for energy retrofit interventions that sometimes are invasive for the application on those historic buildings, even if not punctually constrained, which characterize most of the curtains of the historical centers of the big cities. With the support of bibliographical data and through simplified quantitative checks, the paper highlights the limit of the application of prescriptive regulations for energy efficiency and the critical issues about the compatibility and durability of retrofit solutions applied to traditional wall supports. With the contribution, the authors intend to open a discussion among the representatives of the scientific sector, about the regulatory conflict that exists between the demands for energy efficiency and the demands of the conservation of the built heritage highlighting the need to overcome the diachrony between the productive world and the academic one so that the latter can implement the technological and cultural transfer activities aimed, on the one hand, at the development of clear paths for test and certification of materials and technologies for the recovery and redevelopment of the built heritage and, on the other hand, to the revision of energy regulations structure, in those cases where the waiting of theoretical parameters determine a damage to the preservation of the physical characteristics of the building.