Sustainably supplemented
New timber-concrete hybrid building complements an old building that remains legible with its construction period
On the edge of Nördlingen's old town, a dilapidated building on a former agricultural site was to be demolished and the existing residential building from the 1950s was to be completely renovated. In place of the demolished building, atelier coa designed a new building that directly adjoins the existing building and forms the new address on the site in terms of its dimensions and urban orientation. In close coordination with the city, this construction project created around 40 office workplaces and four apartments, as well as completely renovating two apartments and adding a maisonette to the existing building. The link between the two buildings at right angles to each other is the staircase, which provides barrier-free access to the ensemble.
In order to meet the client's desire for an ecological and sustainable building, the architects chose a timber-concrete hybrid construction method. The load-bearing elements are reinforced concrete ceilings and columns. The solid staircase and additional wall panels on the gable ends serve as bracing. The non-load-bearing timber façade made of cross-laminated timber elements, which is suspended in front of the shell, forms the thermal envelope with mineral wool insulation. The design-defining wooden pilaster strips refer to the area's former function as a "farmer's barn" and serve as a filter for thermal insulation in summer. Bright red fabric awnings accentuate the building, with the communication zones on the office floors echoing the striking color tone in their design.
The added top floor is a timber construction with exposed roof trusses. A new intermediate level was introduced with a cross-laminated timber ceiling spanning the entire width of the house, so that the apartment on the top floor is designed as a two-storey maisonette. Although the new building and the existing building complement each other to form an overall ensemble, their different periods of origin are deliberately designed to be readable. The existing building was given a simple plaster façade, while the color scheme of the windows, bricks and sheet metal corresponds to that of the new building.
Photos:
Daniel Stauch Photography
www.danielstauch.com
(Published in CUBE Stuttgart 02|24)
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