The drab and dated horizontal architecture of the existing building was stripped and reclad in natural stone, resulting in a much more vertical image. The two longest facades were divided into two parts by a full height glazed insert. Behind the glass, new voids were opened up, linking floors two by two, making extra space and flexible lay out solutions possible. The originally deeply recessed window frames have been moved outwards, creating a more spatial feeling on the floors and simplifying maintenance of the building facades. Light limestone was selected for cladding the facades, which brightens the building tremendously, while at the same time accentuating the sustainable identity of the building. The Stationsplein facades are articulated vertically with two storey high window frames and deep recesses. The re-use of the building frame is a very sustainable solution to the brief. The entire new façade, boasting extra insulation and high quality glass, was attached to the existing precast concrete façade elements, greatly improving the insulation, the comfort and the energy performance.