Challenger at Guyancourt, Saint Quentin in Yvelines

A SITE AND TRIPLE POSITIVE ENERGY CERTIFICATION HQE®, LEED®, BREEAM®

Challenger, the iconic headquarters of Bouygues Group, was designed by architect Kevin Roche in association with Saubot-Julien agency and put into operation in 1988. Twenty years later, he was the subject of a comprehensive renovation program with an ambitious goal: to increase energy and environmental performance of buildings while improving the working environment of 3200 employees.

Le siège du Groupe Bouygues

Le siège du Groupe Bouygues

All elements selected to improve energy performance and reduce consumption site have been designed and built with care by SRA on the site and on buildings. This major restructuring of the 5 existing buildings consisted mainly to: strengthen the insulation of terraces and walls, replace the glass facades with a ventilated double skin wall, management of wastewater and rainwater was treated by installing a phyto-purification station with its favorable wetland development of local biodiversity, install 25,000 m2 of photovoltaic solar panels, solar thermal panels on the terraces to meet more than half of domestic hot water, place 75 vertical probes buried under the solar farm to pick up the calories present in the ground and a geothermal doublet on ground water to heat or cool the thermal loop browsing all buildings. Challenger reasoned manner uses the Site’s natural resources to produce green energy needed for its operation and its thermal regulation. For the site to remain in operation for the duration of the work, six construction phases were necessary. A new building was carried out “cockpit” that allows through an interactive system of counting to see and understand the most innovative features of Challenger and explain the many visitors: geothermal and photovoltaic systems, processing and recycling of water …