I would like to present a HUGE project that I think is just as challenging as our Mission Zero : the renovation of the emblematic headquarters of Bouygues Construction. It was first opened in January 1988 and was designed on the instructions of Francis Bouygues in conjunction with the architect Kevin Roche.
Twenty years later Bouygues Construction decided to undertake a complete renovation programme with an ambitious objective: enhancing the complex’s performance with respect to energy and the environment and at the same time upgrading the working environment of the 3,200 employees on site. In 2014, when the works are complete, Challenger’s energy consumption and carbon emissions will have been reduced by an impressive 90% and its water consumption by 60%.
Challenger will be a concrete demonstration of Bouygues Construction’s ambition to be a leader in sustainable construction, not just for new-build projects but for renovation too.
THE KEY ASPECTS OF CHALLENGER’S RENOVATION:
- The insulation of the buildings will be upgraded: 88% of the cladding glass (more than 24,000 m²) will be replaced by a double-skin façade achieving very high thermal performance.
- The heating and air conditioning of the buildings will use the energies naturally present in the ground (ground-source) and air (air-source) as their primary energy sources.
- Part of the electricity necessary for operation of the site will be produced locally by installing more than 21,000 m² of photovoltaic panels.
- Wastewater and rainwater will be treated by filter gardens, artificial wetlands which purify water naturally for re-use on site, for watering the grounds for instance.
THE CHERRY ON THE CAKE : TRIPLE HQE®, LEED®, AND BREEAM® CERTIFICATION !
Designed as a means of assisting sales, as an ambassador-building promoting the Group’s know-how, Challenger is aiming for triple HQE®, LEED® Platinum, and BREEAM® Outstanding certification. Though quite a challenge for an operation of this size, this project has already been awarded a trophy presented by the BRE at Ecobuild in March 2013 for reaching the highest score of the year in 2012 on the BREEAM® International Design Stage rating system.
To renovate 45,000 sqm thinking of their employee’s comfort, makes this project quite unique. Particular emphasis has been paid to the visual design as well as to the acoustic and thermal comfort of the work areas which has meant the areas have been completely redesigned. I can tell you that developing a special Transformation carpet tile, with an especially high reflectance value, whilst remaining aesthetically beautiful and technically high performing has been hard work! Interface’s ‘Transformation’ has been chosen to cover the 45,000 sqm because of its random design which limits the installation waste significantly, its average recycled content of 44% (even with special colours), and because of its low VOC emissions to favour a better indoor air quality. Generally speaking, Interface has been chosen as flooring partner on this project because of its expertise in the sustainability area and its ability to take back the old carpets and recycle them.
THE EXPERIMENT LAB : THE COCKPIT
To better control, follow and show all the technological sustainability devices on site, Bouygues has created a kind of lab where you can feel and experience the scale of this huge sustainable renovation project. The Cockpit, aka the Challenger ‘control room’, allows you to measure energy consumption, production, and recovery in real time, as well as optimise staff comfort. It includes a showroom where interactive and eductional visits of the site can be conducted.
Have a look at these crazy figures and you’ll understand why I admire so much this project :
ENERGY CONSUMED :
Before: 310 kWhpe/m²/year (conventional scope)
After: 31 kWhpe/m²/year (conventional scope)
CO2 EMISSIONS :
Before: 22 kg/m²/year
After: 2.2 kg/m²/year
PHOTOVOLTAIC ENERGY PRODUCTION:
Before: 0 MWh/year
After: 1992 MWh/year
MAINS WATER CONSUMPTION :
Before: 59,000 m3/year
After: 38,500 m3/year
If you want to see how it looks like in real :
The Radical Bouygues Construction Renovation
Next week, I’ll post our Cut the Fluff interview that Philippe Metgès, Central General Business Manager for Bouygues SA, in charge of the Challenger renovation operation, has accepted to answer ! Be ready !