en.Wedoany.com Reported - Bouygues Bâtiment Nord-Est is advancing a renovation project for 400 social housing units in the Elsau district of Strasbourg (Bas-Rhin), further enhancing its low-carbon construction site logistics.
On the relevant plots, the company uses a remote base to store dismantled components and deliver replacements. More innovatively, it has added closed-loop recycling of window and door components at this nearby platform: glass is separated and crushed into cullet to produce new glass, while PVC is also channeled into the manufacturing process of new windows.
This combination is made possible by the service provider's characteristics. As a player in the social and solidarity economy (économie sociale et solidaire), the local group Altaïr pools all necessary skills through its various subsidiaries. Its adapted enterprise Aquilea handles storage and order preparation at the remote base; the sister company Réseau Origami, accredited by the ecological organization Valobat, is responsible for transporting materials, sorting, and other operations before sending materials to specialized channels for recycling; the integration-focused company Presta'Terre directly installs new components within the homes.
The Altaïr group's facility is only 2 km from Elsau, allowing for a limited turnaround time: every morning between 6:30 a.m. and 8:00 a.m., before traffic becomes heavy. "A round trip for a truck crane typically takes an hour," estimates Geoffrey Meszaros, Circular Economy Director at Altaïr.
The implemented operational method meets the site constraints of narrow access for heavy trucks entering the renovated residential buildings (managed by owner Ophéa, which are almost adjacent to each other). It improves the carbon footprint, especially as loading and unloading vehicles use biogas. Finally, it aligns with the general contractor's integration commitments for the project, contributing 1,300 hours out of a total projected 22,500 integration hours.
"We receive the schedule a week in advance to organize at each link in the chain. Advance planning helps anticipate needs, thus avoiding trucks leaving the residential buildings empty on their return to our site," continues Geoffrey Meszaros.
As of early June 2026, three-quarters of the work is complete, with 100 tons of materials recovered in this manner. Bouygues Bâtiment Nord-Est gives a positive assessment of the service combination tested in Elsau. "Through precise thinking and optimization, logistics, by strictly coordinating all delivery and waste collection flows, played a central role in the project's success," comments Sylvie Girard, Logistics Manager for the general contractor. "Together with the Altaïr group, we identified possible improvements to increase the proportion of off-site work: we could still save a few minutes on interventions inside the homes," she adds.
The renovation work is actually carried out with residents present, which requires avoiding inconvenience to tenants. Therefore, the carefully planned loading and unloading schedule includes systematically checking the previous evening that new windows will be available the next morning to avoid any "gaps."
The dismantling-reinstallation also involves sanitary equipment (bathtubs, shower bases, etc.), ultimately totaling 950 such items, in addition to the 1,600 exterior doors and windows already replaced.
The setup also organizes the sharing of storage and preparation of new doors and windows with a simultaneous nearby construction site of Bouygues Bâtiment Nord-Est: the renovation of nearly 400 other apartments by Ophéa in the port du Rhin district of Strasbourg.
Scheduled from January 2025 to early 2027, the works, entrusted by the Strasbourg public body Ophéa (S2E-IC, AMO) to a consortium led by Bouygues Bâtiment Nord-Est, in partnership with AEA Architects, Projex Design Office (Structure and Thermal), Acte 2 Paysage, AC Environnement (Asbestos Removal), and Equans responsible for three years of operational maintenance, total €26 million (excluding tax). The works include external insulation, roof sealing and attic insulation, replacement of exterior doors and windows, hallway doors, sanitary equipment, and various drainage risers.
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