The architectural aspect integrates and developes the intentions behind the urban landscape specifications of the Zac Alphonse Guerin.
The project is divided into two buildings. One of five storeys with an attic level which lines up along Avenue Sergent Maginot and the second a ten storey with attic which faces the banks of the Vilaine to the South.
 

Description of project by Le Trionnaire (x2) - Tassot - The Chapelain - a / LTA  architects

Our approach focuses on creating contemporary architecture in a built environment with an existing heritage of contemporary construction. Our project enters into a harmonious and subtle dialogue with a referential focus on its specific urban context.
 
From this perspective the "Bouygues Immobilier" building proposes a strongly reinforced vertical fragmentation divided into "skyline type" volumes fronting the Vilaine. This vertical fragmentation of the projects volumetry is in keeping with the existing scale of the RENNES skyline as seen from the south/east of the city.
 
Further down and to the north the “Aiguillon Construction” building sits on the Avenue Sergent Maginot and has a resolutely urban facade in accordance with the existing architecture along the quays.

Description of the building façades
 
The south elevation of the larger of the two buildings (68 appartments for Bouygues Immobilier), is largely glazed for maximum comfort, and draped with a semi-transparent metal mesh which, depending on the suns position exhibits varying levels of transparency.
 
This lends the building an overall volumetric coherence and breaks with the sometimes harsh appearance of similar buildings of this scale. From a distance, this building with its play on light, shade and translucency conveys a strangely abstract appearance as that of a cloud floating above the water.
 
The metallic mesh forms a soft but transparent filter against the sometimes aggressive southern light as it penetrates to the interior of the building. The windows are sufficiently large to balance out the meshes protective properties allowing for optimal brightness in the living spaces. The north facing façade on the boulevard assumes a more urban character of masonry, vertical windows with a few hints back to the mesh veil.
 
Gradually the development of the façades moves from the abstract to traditional architecture picking up on the contemporary  references of the urban fabric of Rennes.
 
 
The North elevation of the “Aiguillon Construction” building reflects the smaller-scale domestic approach of the larger residential buildings in Rennes. In a quite sobre fashion it seems to dialogue with its more imposing neighbor to the west the buildings fronting the avenues Aristide Briand and Sergent Maginot.
 
With its facade comprising of a masonary cladding on exterior insulation the building actively presents a series of vertical openings (aluminum windows) and as with the Bouygues building the South façade is largely glazed. The building is raised at ground floor level giving views through to an interior garden. A certain coherence between the two buildings is achieved through the use of the metallic mesh from the “Bouygues” project applied to the guard-rails of this one.
 
The open space between the projects will be carefully landscaped to provide a comfortable outside area which in turn will establish a real   This garden will establish a real link with the two neighbouring buildings.
 
The proposed architectural styles, although different in their approach, belong to the same graphic and architectural register. This serves to highlight their respective identities according to their context and helps to create a coherent ensemble.

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Architecture team
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Le Trionnaire (x2) - Tassot - The Chapelain - a / LTA architects
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Consultants
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NOX + Ouest Structures + Thalem
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Client
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Bouygues Immobilier + Aiguillon Construction
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BBC EFFINERGIE RT 2012
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Program
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94 housing + nursery
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Area
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6 500 m² + Parking
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Venue
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ZAC Alphonse Guérin, Rennes (35), France
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ALTA Architectes - Urbanistes | Le Trionnaire - Le Chapelain is a team structured around four associated architects.

Maxime Le Trionnaire and Gwénaël Le Chapelain, DPLG architects, met in 1997 at the Nantes School of Architecture. After graduating in 2004, they worked in several renowned agencies (Architecture-Studio, Block, Duncan Lewis, Stéphane Maupin, X-tu). The Monitor nominated them for the “First work prize” in 2008. In 2010, they joined forces. Since then they have been developing collaboration and continue to refine their architectural visions.  

ALTA Architectes - Urbanistes brings together around twenty employees who work on a contemporary, contextual and responsive architecture Each architectural project tends towards its own singularity, respectful of the suggested program.

In 2014 their agency won the European award “40 UNDER 40” which rewards emerging generation of European architects and designers under 40 years old.

Alain Tassot and Jean-Luc Le Trionnaire, DPLG architects, have worked together in Rennes since 1990. Rich in major projects in the different spheres related to public or private orders, they founded a/LTA Architects – Planners Agency in 2002. 

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Published on: October 22, 2018
Cite: "94 dwellings and a nursery in ZAC Alphonse Guérin by Le Trionnaire (x2) - Tassot - The Chapelain - a / LTA architects" METALOCUS. Accessed
<https://www.metalocus.es/en/news/94-dwellings-and-a-nursery-zac-alphonse-guerin-le-trionnaire-x2-tassot-chapelain-a-lta-architects> ISSN 1139-6415
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