Window - Maximum length 3m?

Total nonsense. 16 meters in one piece is the limit. 3-4 meters is no problem. We have over 5 meters, movable and frameless.

The glass panes of our patio roof are about 4m long. It might depend on the thickness of the glass? I just read online that there are even 18m pieces in one length,

Best regards
Sabine

18 meter window or terrace roof? There is a difference. I know of a German glass manufacturer who makes up to 16 meters. Possibly there are others who go even further. But in any case, the size of the [TE] is not a problem.

Definitely, the desired size (without subdivision) is not a problem...

We recently had this issue: - it was about 2 x 2 meters, and in my opinion the sticking point, which may be a bit overly cautious depending on taste but cannot be dismissed entirely, is always the distance from the center of the pane to the corners of the pane. In this case, I see it as more favorable due to the smaller width. However, I suspect the bottleneck lies elsewhere, namely with the profile length: the processing machines are often only designed for 240 cm profile length. And since it really wouldn’t be stable to insert a one-piece pane into a two-part frame profile, I understand the concerns - but they should be named more honestly.

This division does not fit the concept of the facade at all!

Using the lofty word "concept" in connection with this facade, however, made me laugh out loud.

These special-shaped panes are always a risk for installers - mistakes are very expensive and so is warranty. So better not offer them or charge a high price - especially when the sun shines on the pane for a long time and it is triple glazing. I would only accept a subdivision if the "mullion corresponds with the entrance door or indicates the floor height. We had a similar discussion and the mullion solution turned out well. There is a blind element that covers the gallery floor, which would otherwise have been visible from the side - see the end face in the photo.