"Iller 21" residential building
The New Apostolic Church, built in 1961 and extended in 1974, was solidly constructed but lacked any design appeal. The Iller 21 project began with the aim of creating a comfortable living space for a family. Initial considerations showed that the low-rise building in front could be sensibly redesigned by making a few changes to the floor plan and creating a new entrance situation, thereby preserving the old building. The built solution for the design of the living space under the 10m high tent roof was worked out with many sketches, models and intensive discussions with the clients.
Even from the new entrance, you can see through the hallway into the living space and the northern bay window. The orchard and a wooden agricultural shed can be seen through the window like a framed picture. This shed, typical of the region, was the reference for the new wooden façade. The center of family life is located under the high tent roof. A “kitchen box” open to the living room with a counter was pushed against the eastern windows. The upper level of the box, which was created under the high roof, is accessed via a shelf staircase and a slender bridge.
In contrast to the spaciousness, the design is deliberately kept very simple and direct. The materials used are predominantly untreated and as free of plastics as possible. The tent roof is insulated with cellulose and has a titanium zinc sheet roof covering with standing seam cladding. The rear-ventilated timber façade made of untreated winter-sawn pine (recommended by the carpenter) sits in front of the existing wall insulated with cellulose and soft wood fiber. The brick walls are finished with a rose-colored lime plaster so that the brickwork structure remains perceptible. A smoothed cement screed has been laid on the floor. Only the bedrooms and children's rooms have oiled industrial parquet flooring.
The interior doors are made of untreated softwood panels, which are held in place by two gray-painted vertical L-shaped steel frames with visible hinges. The project is rounded off by a regenerative and largely self-sufficient energy concept. A brine heat pump with four bored piles in the garden generates the heat for the underfloor heating. The heat pump is powered by a PV system on the flat roof with a battery. The pump allows the rooms to be cooled slightly in summer with cool water from the boreholes. This recharges the underground storage tank for the winter. A room-sealed, automatically controlled pellet stove in the living room can create a cozy atmosphere on cool autumn evenings.
