Social housing in Coignieres
Rehabilitation and extension in occupied site of a social residence of 300 housing units, Coignieres, France
The neighborhood
The plot, with an area of 11 135 m², is located at the far north of the town of Coignières and on the border with the commune of Maurepas, on the other side of the street. The land is bordered by a commercial activity area, on the Coignières side and by a suburban area and offices, Maurepas side.
The existing building to be rehabilitated
The existing site hosts the hostel for migrant workers, realized by the architects Andrault and Parat. This set consists of two identical buildings to R+6 connected by a distribution core dating from 1972 and a car park. With its facade of concrete panels prefabricated, this building is representative of the architecture rationalist of the Glorious Thirties. The rigor of his plan, the readability of its structure and organization make it an interesting support for rehabilitation rooms with current comfort standards.
The project
The operation consists of the rehabilitation of the workers' home migrants and its extension to 31 rue de Montfort l’Amaury in Coignières, which brings together 300 housing units. The geometry of the extension is in continuity with the building existing and generates an urban front on the street.
The urban scale
A new unit that is efficient in its operation and in connection with its urban environment is reated: an entrance more open and more transparent offers a new face in the social residence, a first volume at R+4 forms a scale intermediate, a second volume at R+3 more in length finds a more domestic scale. The articulation of these two new volumes presents a slight inflection reated in hollow which sequences the building.
A drawer operation on an occupied site
The operation was carried out on an occupied site in several phases, with successive moves to to be able to maintain the activity of the home:
— Phase 1: construction of the extension
— Phase 2: rehabilitation of part of the existing building
— Phase 3: rehabilitation of the second part of the existing building
— Phase 4: rehabilitation of the central core of the existing building
Between variety and unity
The new building in extension takes up certain characteristics of the existing building such as concrete facades, the two colors emphasizing the geometry (basement and body of the building), and the rigorous composition of the façade.
On the other hand, the new building differs from the existing one on the height and the orientation of the built volumes, as well as on the geometry window sizes.
The façade
The new building is constructed of mass-coloured white concrete.This material has facing and durability qualities interesting. A hollow joint sequences the volume at the level window sills. Joinery and shutters are in aluminum in a warm amber hue, which contrasts with the minerality cold concrete. The rehabilitated building consists of a façade in concrete panels, repainted to find a white color light reminiscent of the color of the white concrete of the extension.
Stamped concrete, reminiscent of concrete grooves of the basement of the existing building, is used on the façade of the extension, stained in an amber tint. The parts of existing facades formerly red are repainted in the same color to allow together to find a unity.
The reception hall
The new entrance hall is located at the interface of the three accommodation wings, equidistant from the bedrooms. Visible from the street, it also opens onto the green space of the heart of the island. It articulates all the collective functions necessary for residents: social office, laundry, boxes letters, local OM, multipurpose rooms and reserves of laundry. The hall allows access to the distributions which are naturally lit.
Housing
The apartments are served by two staircases and an elevator, present in the extension, and by three staircases in spiral preserved in the existing one. The accommodations are either facing east or west, or in a corner situation.
