TRA VALORE CULTURALE ED EFFICIENZA ENERGETICA: STRATEGIE DI INTERVENTO IN VILLA GAZZOTTI (VICENZA)

Nowadays, restoration cannot avoid addressing energy issues, which must be balanced with conservation needs. Interventions must lead to thermo-hygrometric conditions that are as stable as possible, ensuring the compatibility with the historic and cultural value. As walls are often a key element in this respect, only minor building components, such as roof, flooring and windows can be improved. The usage of building information modelling and energy simulation can help in optimizing the intervention strategies. Villa Gazzotti in Bertesina (Vicenza) is currently unused, lacks many window frames, has no flooring to prevent rising damp and no roof insulation. The energy analysis of the villa, carried out in Edilclima, was calibrated over thermograms of the interiors, also considering the ventilation conditions. Dynamic analyses show the significant impact of window frames (17%), ground floor (5%), and roof (20%) on the overall heat loss, as well as considerable fluctuations in indoor temperature. The proposed interventions include the replacement of window frames, matching the existing ones, the construction of a basement floor, and roof insulation. The frames, by reducing open joints, decrease daily indoor temperature fluctuations, while the roof and floor insulation reduce heat dispersions. Therefore, even minimal interventions can improve conservation conditions, although comfort conditions for visitors are yet to be reached. Considerable limitations are found in the simulation tool, underscoring the need for more appropriate approaches to energy analyses of historic buildings.