Total renovation and new construction in record time
The Hagenmatt residential development in Root was completely renovated and optimally compacted in just eight months.
The Hagenmatt housing estate in Root, with around 160 flats, is a good example of successful total renovation and redensification: the estate, built in the 1970s, offered ideal conditions for this project. For the implementation, Die Liegenschaftsverwalter AG, representing the owner Schürch Immobilien AG, engaged PP Baumanagement AG from Kriens for the overall project management, cost planning and construction management. In addition, six new buildings with a total of fourteen terraced detached houses and fourteen 2.5-room flats in timber construction were realised by Strüby Konzept AG from Seewen SZ on behalf of the owner.
In addition to a more attractive design of the flats, the renovation also aimed at optimising the building’s appearance, redesigning the outdoor spaces and optimising energy efficiency. The latter was achieved thanks to technical measures such as triple-glazed windows and a connection to the EWL district heating system, as well as switching off the oil-fired heating system. For more living comfort, underfloor heating was installed in the existing property, the balconies were extended, the kitchens were equipped with new appliances and the wet rooms were renovated.
The newly built single-family and multi-family houses are all two-storey and blend in harmoniously with the previously underutilised areas. They feature Minergie-compliant building envelopes, green flat roofs, generously designed roof terraces, and large windows that ensure that the houses are flooded with light. The total renovation of the Hagenmatt development and the construction of the six new buildings was completed in stages within eight months.
The fast construction time – especially for the new buildings – is due to the chosen timber construction: The components are delivered to the construction site prefabricated, so that assembly can begin directly on site. The Strüby companies purchase around 20,000 cubic metres of wood per year directly from Swiss forest owners. The wood is sawn and glued in the respective region before it is processed further. Thanks to these short distances, grey energy is significantly reduced.
In addition to the short construction time, the owner of Die Liegenschaftsverwalter AG, Andreas Gasser, is proud that the project’s total cost budget of 42 million Swiss francs could even be undercut. Moreover, the quality of living for the tenants, who were not yet affected by the conversion in the first stage, was not restricted at any time. Gasser emphasises that by cleverly increasing the density by adding storeys, extensions or supplementary buildings, it was possible to create more living space on existing areas and at the same time curb land wastage.