double glazing with seamed panels, low-emission treatment of glass panels, depending on type of glass, argon gas-filled gap instead of air, warm-edge

external seal between glazing and wood (no silicone)

3 layers of certified non-toxic resin coating

aluminium profiles to protect the bottom of the window, run-off channel on window panel and drip edge on frame

3 thermo-acoustic seals between window panel and frame

fittings with 160 kg load capacity for tilt and turn opening + micro-ventilation in the hinge covers

glazing held with screwed clips and glazing beads

wood polishing on flat surfaces and frames using hi-tech tools

laminated spruce timber (no finger joints), PEFC-certified