Abstract
Traditional architecture represents an important part of the built stock in the Alpine region of South Tyrol (Italy) and improving its energy performance is crucial for its conservation. However, forecasted climate change might impose great risks for the hygrothermal performance of historic buildings after their retrofit. This paper explores the interaction between climate and the performance of retrofitted historic buildings based on the analysis of local weather conditions and the identification of homogenous climatic zones. For each climatic zone, the traditional constructions are defined, and a tailored climate projection that considers not only temperature but also the combined effect of precipitation and wind is created. Finally, the future hygrothermal performance of traditional constructions is simulated, combining different masonry wall constructions and internal insulation systems. It is found that there will be increasing condensation risks in retrofitted granite walls in the colder areas of South Tyrol due to changes in the future climate.