SHA Scheffler Helbich Architekten GmbH
Phoenixplatz 3
44263 Dortmund
Dortmund: Haus am See
House in one-room depth
A one-room house with an open floor plan was built on the banks of the eighty-year-old irrigation pond on a small plot of former gardening land with mature trees. The width of the house is defined solely by the length of the transverse staircase. Its external appearance is derived from the strict and pleasantly orderly development plan.
The structures of the south-facing main house and the garage form the entrance in their joint, whose continuous wooden deck extends into the garden by the lake.
By relocating the vestibule to the joint and the checkroom and guest WC to the garage structure, it was possible to create a completely open floor plan on the first floor of the main house. At the same time, this arrangement of the buildings creates a clear separation between the private and public open spaces in front, despite the continuous glass façade in the main building.
Inside the house, all rooms face either south or the lake to the east and open up to the outside with large windows. Behind the window grid, which is always the same, there are slender steel supports on each axis in the form of rectangular profiles just four centimeters wide.
To set the scene, the windows are framed by aluminum frames on each floor. The resulting soffits create a structured shadow play, provide the necessary sun protection and direct the view. At the same time, the depth of the construction creates increased privacy because it is not possible to see into the house via the diagonal.
Figures and
Facts
- One-room house on the site of a former nursery
- Architects: SHA Scheffler Helbich, Architekten GmbH / Birgit Helbich, Christoph Helbich
- Construction method: Solid construction (brick masonry)
- Living space: 160 m², additional usable space: 90 m²
- Place: Dortmund
The house meets all the requirements of the low-energy standard, but completely dispenses with the use of cost-intensive and primary energy-intensive high-tech. Instead, the focus is on low-tech with architectural features such as compactness, zoning and orientation: All heated functions are located in the main building, while low-temperature rooms such as the vestibule, checkroom and guest WC are located outside. The main building has an ideal A/V ratio thanks to its cubic shape without projections or recesses and is completely glazed to the south and east.
The three brick exterior walls, which are set against the glass surfaces as white plastered panes, are constructed as 36.5 cm thick single-skin poroton masonry, so that a costly and climatically unfavorable thermal insulation composite system can be dispensed with.
To further improve the microclimate, all roof surfaces are extensively greened, which additionally prevents cooling in winter and overheating in summer.
At the same time, existing technology is used intelligently: All heating thermostats in the rooms are arranged so that they are already exposed to the morning sun. This means that the underfloor heating is not only switched off when the room is at the required temperature and the inertia of the heating could cause it to overheat. Instead, the heating switches off when the morning sun shines so intensely that sufficient solar heat gain can be expected from the glazed façades throughout the day.
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