Located in the municipality of LERY and bordering the town of VAL DE REUIL, the Quartier des Sentiers consists of 20 buildings ranging from R+ 3 to R+ 5, comprising 235 collective dwellings built between the years 1975 and 1980, totalling a living area of 15.746 m².These dwellings are equipped with individual gas boilers providing heating and the production of sanitary hot water. The ventilation facilities are located on terraces and in the attics. The extractors are in a good condition but their performance is average compared to current technologies.BAZ type mouths for connecting the boiler in the kitchen are in an average state.A part of the facades (mined panels) is covered with wood in poor condition, the other part of the panels is coated with sheet metal in an average state. Thermal bridges can be seen on the intermediate facades/floors. The original radiators are aging, the thermostatic valves are in average condition and of average performance.