Classic is Sky-Frame’s basic system. The sliding windows comprise insulating glass units with perimeter sections made from aluminium or glass-fibre-reinforced plastic (GRP). Mounted in aluminium frames that are fitted flush with floor and ceiling, the sliding units offer minimum rolling resistance when operated. The rectilinear Classic window system evokes timeless appeal. True to the Bauhaus vision, the ceiling-high glass facades help to create a minimalist architecture in which the view takes centre stage.