An office block located to the north of Milan, originally built in the 1960s, was extended a decade later. The primary brief for the renovation almost five decades later was to upgrade insulation and improve the building's ecological credentials. A ventilated Swisspearl® curtain-wall system was therefore superimposed on the north and south façades. The architects had a clear, technically straightforward and architecturally intelligible concept for the refurbishment of the existing building. Oliva Associate's choice of façade material, i.e. Swisspearl® cement composite panels, as well as their format and color, were vital to achieving their design goals.