In a city where iconic buildings follow each other, Grimshaw studio seeks to highlight using colour. Beyond chromatic issues, what we are interested to emphasize here is the complexity of the unitized panel formed by a double sheet and anchored in its upper third, at a certain distance from the top.The panel is transported, hoisted and placed with the double sheet already assembled. The interior sheet ensures water tightness and thermal insulation while the exterior, which partially covers the panel, acts as a solar protection.