TwinSet 8000S profiles are made of a combination of uPVC and aluminium, offering superior U-values for energy efficiency. In addition, the three sealing levels used in the construction of the profile reduce the effects of thermal bridges.

All seals are integrated into the frame, providing proper insulation of the 6-chamber system and allowing the glazing to be mounted flush with the casement frame. This has the additional benefit of ensuring a weather-proof seal to reliably stop cold air from entering the house. These ensure that the frame itself provides excellent insulation and not just the glazing. The best triple glazing can’t work miracles if the frame surrounding it is much less efficient.

Finally, the outer aluminium shell provides an additional barrier between the frame and outside air which further boosts the Uw-values, leading to impressive thermal performance.