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BESIX, Valens and In Advance deliver new RTBF headquarters Média Square in Brussels
Brussels, 27 May 2025 – BESIX, Valens (Eiffage Group) and In Advance, together JV VALBESINA, proudly announce the successful completion of Média Square, the new headquarters and production company of RTBF (Belgian Radio and Television of the French Community). The building covers a gross area of 38,000 m². The completion was formalised today in the presence of Mark Beyst, General Manager BESIX Belgium-Luxembourg, Christophe Van Ophem, CEO Eiffage Construction BeLux, Stefan Eerens, CEO Valens NV, and Jean-Paul Philippot, Administrator General at RTBF.
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Unique construction challenges
Média Square is equipped with 18 studios, designed to share equipment between the teams, which optimizes resources and accelerates content production. This versatility meant that the site teams faced unique structural and acoustic challenges during construction. "We constructed these studios as completely soundproof units," said Tom Michiels, Project Director at BESIX. "Each studio is surrounded by multiple layers of sound-absorbing material and concrete to completely eliminate external vibrations and sounds. Additionally, some studios span multiple floors. To manage these structural challenges during construction, we installed temporary structures until the end of the main construction phase."
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Innovative construction techniques and sustainability
The construction of Média Square leaned on advanced sustainable building techniques, such as concrete core activation. This method exploits the thermal mass of concrete for energy-efficient heating and cooling. "Normally, installations like ventilation and cabling are processed in the ceiling," explains Tom. "But due to the concrete core activation, we had to integrate these elements into a raised floor of 80 cm. This is complex, as each new technique could impede the subsequent process. This created a circular construction process requiring constant access to the space beneath the floor, which demanded additional coordination." To avoid potential conflicts between technical installations and the structure of the raised floor, an innovative solution was deployed. A BIM printer was used to print the exact locations of the floor supports on the subfloor. This ensured extremely precise placement and prevented issues later in the construction process. Additionally, great attention was paid to airtightness, with the team achieving a value of 0.30 Vol/h in the first test, significantly better than the target value of 0.55 Vol/h. In comparison, a passive building is allowed a maximum of 0.60 Vol/h.
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Teamwork and collaboration
The successful completion of Média Square is due to the close collaboration between various departments at BESIX, Valens and In Advance, together TM VALBESINA, and the dedication of the site team. Following the success of the new BNP Paribas Fortis headquarters on Warandeberg, BESIX and Eiffage once again demonstrate their expertise and craftsmanship with this completion.
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About BESIX
BESIX is a leading Belgian group, based in Brussels and operating in 25 countries and on 5 continents, in the construction, real estate development and concessions sectors. Active since 1909, its iconic achievements include Dubai's Burj Khalifa, the tallest tower in the world, buildings of the European Parliament in Brussels as well as the Grand Egyptian Museum, on the Giza pyramids plateau. The Group's engineering department enables BESIX to carry out complex and unique projects, particularly in terms of technical and environmental aspects.
About Eiffage
The Eiffage group is one of the European leaders in construction, energy systems, infrastructure, and concessions. Eiffage Construction BeLux operates through its fifteen subsidiaries in buildings, civil engineering, real estate development, hydraulic and environmental works, joinery, and industrial activities.
About Valens
Established in 2006, Valens has extensive experience in various sectors. The company is active in the construction of transport infrastructure such as high-speed and local train lines, bridges, tunnels, viaducts, and metro lines. Moreover, Valens builds new structures, including office buildings, hospitals, shopping centres, residential buildings, cultural and sports facilities, public amenities, and industrial buildings. Valens also excels in the renovation and restoration of both listed and non-listed buildings, thanks in part to the expertise of its subsidiary ART. Additionally, the company carries out environmentally related works, such as projects for sorting centres and sustainable development initiatives. The numerous achievements of Valens stand as the best evidence of its ability to adapt to the continuous evolution of the market, catering to both public contracts and private projects.
About RTBF
RTBF is a public cultural enterprise. Active in television, radio and digital via its own platforms and social networks, its ambition is to be everyone's media in the Wallonia-Brussels Federation. Every day, RTBF delivers pluralist, independent information, promotes culture, heritage and local talent, and ensures the transmission of memory. To uphold public service values in an increasingly digital society, the company is organized around two poles, “Media” and “Content”, which are supported by Technologies and other departments. At the core of our productions and creations are our audiences. To foster innovation in the cultural and creative ecosystem, RTBF is very active in the (co)production and distribution of innovative formats, including interactive storytelling and podcast narratives.