ᐅ Topic: Windows in Attic Conversions

In my parents' attic apartment, with a roof pitch of about 45° (45°), the windows were often covered with snow in winter to the point that it was dark inside anyway.

On the sides without snow guards or on the south side, it was often still possible to push the snow down, but on the other sides it required a real effort. I imagine it would be even more extreme with a 25° (25°) roof pitch.

We recently installed Fakro windows. Good quality. The smaller ones have triple glazing, while the larger ones have double glazing due to weight considerations. The triple glazing does make a noticeable difference. We have roller shutters. In winter, they sometimes freeze, but this is not a major issue.

Our roof has a 40° pitch. We installed Roto double-glazed windows. Even the largest window measuring 1300 x 1400 mm (51 x 55 inches) operates smoothly without any issues.

The accessories are excellent. We have exterior roller blinds on all windows that provide 100% blackout, plus additional interior blinds for aesthetics. The electric exterior blinds are mounted directly on the frame, allowing the windows to be opened even when the blind is fully closed (which is not possible with Velux).

The two pivot windows also have insect roller screens that fit perfectly and provide 100% coverage.

Is there actually a kind of "frame heating" to prevent freezing, or would that be more like casting pearls before swine and therefore pointless?

Frames, especially in the past, made of aluminum were thermal bridges. Today, when it is very cold, you get condensation on the glass at the corners. Exterior blinds help with this.
According to the manufacturer, radiators under the windows are even recommended 🙄 Rather pointless if you have underfloor heating installed.