Overview of the project
Built in 1975, the renovated building is a common type of small-scale collective housing. The operation carried out by Le Toit Vosgien is therefore easily replicable, especially as its cost is exceptionally low (less than €700/m2 of floor space).
The project uses external insulation in wooden boxes. The wood wool insulation is complemented by terracotta and wood cladding on the facade. This combination of prefabrication and facade materials that are not sensitive to external conditions allows the construction to proceed smoothly regardless of the weather conditions or the time of year. For the tenants, the only intervention requiring their presence is the drilling of the original façade in about ten minutes to install the inlet ducts for the centralized double flow ventilation system.
In addition to the energy performance and the choice of bio and geo-sourced materials, the operation also aims to improve the quality of the air inside the dwellings and to reduce the tenants’ energy bill by installing a wood chip boiler room (for heating and domestic hot water).
Le Toit Vosgien renovated a residence of 24 dwellings in 2017, with the help of European Union funding under the ERDF-ESF programme.
As with all of its operations, Le Toit Vosgien carried out a post-work performance monitoring. According to this monitoring, the 30cm external insulation and the change of boiler have enabled a tenfold reduction in energy costs.
In addition, according to the official French RT2012 standard, the building’s primary energy consumption fell from 400 kWh/m2/year to 47 kWh/m2/year. The building is thus as efficient as new buildings delivered before 2022 in France.
This operation received the Energy & Temperate Climates Award at the Green Solutions Awards France 2020-21.
With the help of European Union funding under the ERDF-ESF programme.
Created in 1956, LE TOIT VOSGIEN now manages a portfolio of more than 3100 rental units, including 2400 flats and pavilions. The company’s vocation is to house mainly a large number of employees of industrial and service companies, but also the most modest Vosges residents.