The thermal renovation project of the Bellini residence in Bouscat built in the 1980s and comprising 100 collective housing units (5 buildings) is part of the overall renovation process. The objective of the thermal renovation of the Bellini residence is to increase the energy performance of the residence in order to improve the comforts of tenants. In terms of energy performance, this project aims, after work, to the primary energy coefficient of 118,73 kWhep/m².an (the energy label C) which could represent a gain of 104.9 kWhep/m².an.