**3. Thermal and seismic rehabilitation design**

The integrated intervention here investigated for the rehabilitation of the RC existing buildings under study consists of the following:


According to the European Standard EN ISO 6946, 10077, and 12631, the total thermal transmittances for cases C1, C2, and C3 are 0.69, 0.28, and 0.28 W m<sup>−</sup><sup>2</sup> K<sup>−</sup><sup>1</sup> , respectively. In dynamic conditions, heat transfer coefficients, including the thermal bridge contribution, have been calculated according to the ISO 13789:2017.

In the following, starting from the assessment results obtained for the as-built configuration (C1), both energy and seismic performances of the two proposed integrated solutions have been evaluated with respect to two different locations, namely Milano and Palermo.
