During the energy-efficient renovation of an inventoried townhouse in Basel, the focus was on preserving the existing window frames. At the same time, the thermal insulation was to be significantly improved without changing the filigree historical views. The solution lay in a particularly slim insulating glass structure with Swisspacer spacers.
More energy efficiency with minimal intervention
The use of Swisspacer enables a high level of thermal insulation despite low glass thickness. Due to the low thermal conductivity of the spacer, the temperatures at the edge of the glass remain high, which reduces condensation and the risk of mould – a key advantage in existing buildings and sensitive renovation projects.
Thanks to the slim design, the existing window frames could continue to be used without visible adjustments. For builders and investors, this means energy-efficient improvement without cost-intensive interventions in the historic substance.
Detail quality as an architectural added value
In addition to the technical performance, Swisspacer is also convincing in terms of design. The restrained edge bond blends inconspicuously into historical frames and supports clean, high-quality detail design – an essential criterion for listed buildings and sophisticated architectural projects.
The project exemplifies how Swisspacer combines energy efficiency, building physics and design to enable solutions that meet both the architectural requirements and the economic and energy requirements of modern renovations.
Key benefits at a glance
- Significantly improved thermal insulation with minimal glass thickness
- Preservation of existing window frames without visible interference with the historic substance
- Reduced condensation and risk of mould due to high surface temperatures at the edge of the glass
- High architectural detail quality thanks to inconspicuous, slim edge seal
- Cost-effective renovation solution for listed and sensitive existing buildings
