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Residential building extension in Lindau, 2021
In Lindau on Lake Constance, we realized the world's first residential building extension using a 3D construction printer to expand the living space of a house by 120 m².
A detached existing building from the 1960s was expanded using 3D printing, allowing the building to enter a new cycle of use as a modern residential building. An entirely new floor was printed onto the existing single-family home. The additional floor has a floor area of 120 m² and a height of 3.70 m.
Location
Project category
Residential construction, extension
Pure printing time
35 hours
Project participants
Lake Constance Architecture
Baldauf Building Printing
Heidelberg Materials
IMPRESSIONS OF THE PROJECT IMPLEMENTATION
Just add another one
World premiere on Lake Constance
First, the old roof was removed and a new concrete slab was added to the existing structure, onto which the new floor could then be printed. The COBOD BOD2 3D printer was then quickly set up around the printing area.
A building grows beyond itself
The new floor covers an area of 120 m² and has a height of 3.70 m.
Also included: The show with the mouse
The WDR accompanied this project with its camera and published a child-friendly report for the Sendung mit der Maus (Section with the Mouse).
Living space upgrade with a modern look
After the printing was completed, the new wooden roof was installed ready for assembly. The extension was ready for occupancy in a very short time and now offers the residents significantly more living space.
Requirements and solutions
Requirements
Adding a storey to the existing 1960s building presented a particular challenge. The age of the house required precise architectural planning to ensure the load-bearing capacity of the existing structure and create a harmonious connection between old and new. Since the project was the first in the world to be carried out on an existing single-family home, technical hurdles also had to be overcome: In addition to integrating the 3D-printed storey into the existing structure, the slope of the property had to be taken into account, which made the setup and operation of the printer somewhat more challenging.
Solutions
The load-bearing capacity of the old building was thoroughly tested prior to printing and reinforced with an additional concrete slab, providing a stable foundation for the new floor. The architectural planning ensured a visually and structurally seamless connection between old and new, ensuring the expansion was not only functional but also aesthetically pleasing. Close collaboration between the architectural firm Bodensee Architektur, Baldauf Gebäudedruck, and the on-site printing team was crucial in completing the extension in just 35 printing hours.
Customer benefit
The project demonstrates how 3D construction printing technology can also be used to expand existing buildings. The project demonstrates how existing building sites can be used innovatively to create modern living space – even while taking challenging structural conditions into account.
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