A unique project
To consolidate 35 previously dispersed state services 46,000 square meters of office space were needed as well as various spaces, including an inter-administration restaurant, a conference room, a sports area, a documentation center, a nursery and a 450-seat auditorium. The work also focused on bringing the standards to a higher level, according to a certification process “NF Bâtiment Tertiaires en Renovation – Démarche HQE®” as part of the “BBC EFFINERGIE Rénovation 2009” label. This ambitious project was led by the companies Sogelym-Dixence Holding, F-S Architecture Agency. Braun and Associates, Campenon Bernard Construction CBC, a subsidiary of the construction division of Vinci and Dalkia.
To rationalise the occupation of spaces and mutualise facilities, the project presents a high degree of modularity while complying with the standards of an energy-efficient office building, as well as with the standards of the State’s real estate policy.
Joinery for classified façades
The Ilôt Ségur Fontenoy brings together two heritage buildings: a first building located at Place de Fontenoy, initially assigned to the Department of the Merchant Navy, constructed by the architect André Ventre in 1932. A second building, located along the Avenue de Segur, more imposing and built in 1935 by the architect Jacques Debat-Ponsan for the former Ministry of Posts and Telecommunications (PTT). The architectural firm F-S. Braun et associés was able to highlight the rich heritage of the whole patrimonium. The architects opted “to maintain the continuity of the façades by magnifying their rounded corners and redesign the two well-differentiated entrances to the Ségur and Fontenoy buildings.
The architectural approach was immediately in keeping the volumes, the composition of façades and the original carpentry. To renovate the building envelope in accordance with the existing structures, the architects chose to replace wood joinery with aluminum frames.
“We have been using Reynaers Aluminum, who has been our partner for several decades,” says Jean-Charles Pineau, head of price studies at Seralu, for the creation of custom solutions, new products from existing ranges to meet the specific demands of this project”.
Breathable façade
The aim of the restructure of the block was to streamline its use by connecting the two buildings, Ségur and Fontenoy by a new construction, a “bridge building” which groups meeting rooms. For this more technical implementation, Reynaers Aluminum has developed with Seralu an ATEX procedure with CSTB to develop a breathable façade from the CW86-BR VEP range. “This joinery system,” says David Emaille, “consists of interior double glazing and single glazing between which motorized blinds are placed and low-lying filters that provide natural ventilation between glazing units. This is where the name “breathable façade” comes from.” From the realisation of the aluminium joinery for the classified façades to the more technical part of the studies for the breathable façade, Reynaers Aluminum has used all its know-how for this iconic project.
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