The project involved the redevelopment of a Public Residential Building located at via delle Alzavole 20, within the territory of Municipality VI. The buildings underwent a series of routine and extraordinary maintenance interventions.  The building, built in 1975 as part of a special housing plan made funded by the European Community, was redeveloped. Specifically, the project included the waterproofing of the roof terrace covering a total area of 2200 square meters. Additionally, single building units affected by leaks over time were repaired. Before proceeding with the waterproofing, which was carried out through a layer of reinforced resin, a preliminary survey was conducted to know the real composition of the roofing, that was made in different materials and supports. The preliminary survey was necessary to ensure proper execution of the works. The choice of reinforced resin was made due to its good resistance to atmospheric agents, low maintenance required and the ease of repair in case of damage.