In the last decade, a growing attention, in international context, to the heritage buildings efficiency improvement has recently led to the publication of two Guidelines: the European Guidelines EN 16883 (2017) [1] and the Italian ‘Guidelines for the improvement of energy efficiency in cultural heritage’ (2015) [2]. This two documents are not mandatory, but they are worth knowing and analyzing: they represent an instrument to help public authorities and designers to follow an iterative retrofit process; however, in both cases it is possible to notice some difficulties in their technical application and the need to be implemented: one challenge is to analyse them, to improve the two procedures through an in-depth study. Other instruments and researchers have been produced on this topic, but not specifically on Mediterranean context.
The intent of this research is to define an integrated assessment strategy to evaluate historic buildings retrofit options, focusing on Mediterranean climate. The final goal is to define a multicriteria method to guide the planning process, as a whole building approach.