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Due to increased demand for space and the introduction of an all-day education programme, a third construction stage had become necessary for the Stuttgart-Stammheim primary school. We decided to construct the new building using timber construction.
In the north of Stuttgart, our design for the extension building of the Stammheim primary school provides a contemporary response to the growing demands in the education sector. The primary school underwent a progressive expansion that not only creates functional spaces for approximately 400 students and 30 teachers but also does what architecture ideally always does: it opens up possibilities.
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The building is integrated into the existing school complex on the former playground to the east of the main building on Burtenbachstrasse. Its diamond-shaped floor plan is the result of the geometric boundary conditions of the neighbouring development and gives the building a soft contour through laterally cut off and rounded corners.
From the outside, the extension presents itself as a combination of large glass areas and closed light grey wooden sections made of silver fir. The vertical wood cladding is structured by horizontal segmentation: wide bands alternate with narrow wooden slats and narrow bands alternate with wide wooden slats, creating a dynamic effect that, in the interplay with the different window formats, forms a differentiated façade.
The new timber building was constructed in accordance with the sustainability criteria of the state of Baden-Württemberg, which promote future-oriented construction methods and aim to strengthen the ecological, economic and sociocultural qualities of buildings. For example, the extension achieves an energy efficiency that is 30 percent below the standard of the German Energy Saving Ordinance (EnEV). Other criteria include the sustainable use of resources for timber and concrete components, the use of health-compatible and environmentally friendly building materials and thermal and acoustic comfort in the interior spaces.
There is a photovoltaic system on the roof, a green roof, a local heating system with underfloor heating and a ventilation system with night cooling.
Awards: Holzbaupreis Baden-Württemberg 2024 - Recognition
School buildings are places that not only impart knowledge but also strengthen the social fabric and provide space for innovation, creativity and community, as demonstrated by our design for the extension of the primary school in Stuttgart-Stammheim. What emerged is a geometrically complex, three-storey new building in sustainable timber construction with 17 classrooms.
The biggest challenge was to design the building volume in such a way that the extension would be classified under building class 3 according to building regulations. With a higher building class, fire protection requirements would have increased significantly. The associated height restriction – the top floor height must be below seven metres – meant that the respective storey heights of the three-storey building had to be limited to 3.50 metres. To create sufficient clear ceiling heights in the classrooms, the floor slabs were to be implemented with a maximum construction height of 30 centimetres. Given the wide-span ceilings in the classrooms – combined with the non-orthogonal basic geometry of the new building – this was only possible with a timber-concrete composite floor slab (TCC). To further maximise load-bearing capacity, the TCC slabs were designed with so-called birdsmouth joints. To create this geometric form fit, recesses are worked into the wood ply and the cast-in-place concrete cover then “hooks” into the indentations.
The extension we designed combines the aspects of sustainable construction with an innovative and experimental design, finding a balance between creativity and functionality that both meets the needs of the school and supports contemporary educational work.
a+r Architekten stand for solid, environmentally compatible and future-oriented architecture with impressive expertise in the field of sustainable building — also in existing building contexts. Founded in 1985 by Professor Gerd Ackermann and Professor Hellmut Raff, the office with branches in Stuttgart and Tübingen has around 130 employees and is today headed by Oliver Braun, Florian Gruner, Alexander Lange and Walter Fritz. a+r Architekten mainly build for public clients, industry and commerce, municipal housing companies and social institutions. The office focuses on appropriate, ecological, functional and the resulting innovative construction methods. In line with the conviction that “only together as a team can we meet the challenges of the future,” a+r Generalplaner GmbH was founded in 2021 under the leadership of Johannes Weiß.
