The corridor glass walls were constructed with the fecoplan all-glass construction in combination with oak real-wood veneered, corridor-side ﬂush-mounted wooden door elements with horizontal veneer and corridor-side concealed frames. By processing the veneer in its own production unit, feco was able to ensure exceptional quality not only in terms of the technical aspects of the door panels. The oﬃce partition walls are ﬁed with acoustically-eﬀectively slits at intervals of 14/2mm and equipped with ﬂush-mounted, pinnable felt panels. The skylight glazing of the oﬃce partition walls is fecoﬁx double glazing with all-round 20mm slender frames to meet the high sound insulation requirements. feco has aided sustainability certiﬁcation by using PEFC-certiﬁed wood-based materials. In 2018, the DGNB (Deutsche Gesellschaft für Nachhaltiges Bauen – German Sustainable Building Council) awarded the building, which had already been pre-certiﬁed Gold in the planning phase, its top Platinum rating.