Plastic windows with a classic design were chosen during the refurbishment of this historic building with a natural stone façade. The carefully chosen decorative elements, such as the rungs, Venetian mouldings and brass handles, preserve the unique living environment. The ground-level, four-leaf parallel sliding door on the ground floor provides direct access outside. Despite the large surface area of the windows, the plastic core improves the building’s energy efficiency significantly. All windows are equipped with SWISSPACER.