The structure to cover the CentraleSupélec college is made up of two parts. The top part is formed out of a tensile FX901 diaphragm which seals the roof, and below this, ETFE cushions with double translucent films have been installed. These cushions stand out for their resistance, lightness and transparency. This has achieved the transmission of natural light to the inside of the building. It also confers a singular innovative style.
Between the two complexes making up the structure is a pressurised air chamber which improves the thermal and acoustic behaviour of the roof. The circulation of dry air within the chamber prevents condensation from forming inside it.