The Palaiseau CRI gets in tune with Wicona

The context: an exemplary rehabilitation-extension

Until now cramped and scattered over several sites. They now live in the city center in an old school rehabilitated and enlarged to accommodate the conservatory and the Cultural Factory, dedicated to exhibitions and artist residencies.

Winner of the competition in 2018, the proposal from Deshoulières Jeanneau Architecte won over the project management with its heritage and environmental aspects. “The architect chose to keep the two original buildings and create a semi-buried junction, minimizing the carbon footprint of the project while harmoniously housing 2 m400 of program on a plot of 2 m3”, explains Arnaud Martin, director of the Heritage and Construction department at the Territorial Planning and Living Environment Center of the Paris-Saclay agglomeration community.

Thus, the rehabilitated buildings house the administration, musical training rooms and the Cultural Factory. In the right of the old courtyard, the contemporary extension integrates rehearsal and dance spaces and takes advantage of the steep slope of the land, sliding an auditorium 7 meters under the open square and serving the different structures from the avenue.

The challenges: high environmental and acoustic quality

The high environmental quality gave the “The” of the project, selected by Ademe to participate in an E+C- experiment.

Another key issue, specific to this type of equipment: acoustics. No less than 26 rooms are dedicated to musical practice and training. The aim was to ensure that students were not inconvenienced from one room to another, but also that local residents were also protected.

These two guidelines guided other major objectives of the project, such as thermal performance, the fluidity of circulation between the different levels, the brightness of the interior spaces and the aesthetic cohesion of the whole. “We have ensured that the solutions implemented are part of the response to these requirements,” emphasizes Arnaud Martin. Among them, joinery has greatly contributed to achieving these objectives. » The brick and millstone of the early 1.100th century meet the low-carbon glass and aluminum of the early 2st century, with XNUMX mXNUMX of WICONA curtain walls, windows and access doors set to music on the new part as on the old part by the company Plastalu, holder of the macro-lot relating to exterior joinery, solar protection, locksmithing and aluminum cladding.

WICONA solutions: efficient at all levels

With one of the lowest carbon footprints in the world (2,3 kg of CO2 per kg of aluminum), the WICONA Hydro CIRCAL 75R aluminum ranges constitute an asset in this project with strong environmental ambition. Particularly in the Life Cycle Analyzes (LCA) carried out for the carbon (C-) part of the E+C- approach.

On the energy side (E+), they make it possible to achieve Uw coefficients of 1,2 W/(m2.K) for certain curtain walls (MECANO 52 grid) and 1,4 W/(m2.K) for high insulation windows (WICLINE 65 HI+ and WICLINE 65 evo HI). As for the acoustic reduction, it is carefully differentiated according to needs, ranging from the classic 30 dB to the very efficient 43 dB.

The fineness of the profiles – facades, windows and doors (WICSTYLE 65) – optimizes the brightness of the interior spaces, in particular on the curtain walls raised on 3 levels around the patio, itself lowered to R-1. High point of the composition: the color of the joinery, a textured satin RAL 8019 gray brown, matches the color of the brick and that of the millstone of the old school.

The benefits: a well-orchestrated project

“The project perfectly met the environmental specifications and the site integration program, with a highly qualified multidisciplinary team and within the estimated budgets at the time”, underlines Arnaud Martin. Upon delivery, three years after a technical but well-orchestrated project despite the hazards linked to Covid, the CRI acts as an excellent student by displaying the HQE and E3C1 labels, and by welcoming satisfied users!