The old ground floor warehouse of a terraced house in Ledeberg is replaced by a new wooden roof. The largest possible rectangle, cut through the main building, is fitted. Where the rectangle meets the fragmented plot boundary, patios emerge. Two wooden girders in a T-figure carry the roof, supported at their intersection by a new concrete column. The direction of the structure dictated by the main beams. Light walls made of insulating stones make rooms and insulate the partywall.