ᐅ Windows – Maximum Length 3 meters?

Created on: 31 May 2020 09:31
D
derChaos78
Hello home builders,

I received my windows on Friday and now I am quite upset!
We have a window in the stairwell with rough opening dimensions of 76cm (30 inches) width and 334.5cm (132 inches) height! The window is fixed and must be laminated safety glass (VSG). In all the plans, this was shown as a single continuous pane. There were no notes or questions from the construction company. Now this window has a division (mullion) at 110cm (43 inches). This division does not fit the façade concept at all!
First statement from the contractor: This glass cannot be ordered like this because of structural issues.
First statement from the window supplier: There are no glass panes longer than 3m (10 feet).

I feel completely misled; everyone says something different and on Friday we had a great "telephone game" situation (I call the contractor, who calls the window supplier, who calls his installer on site, and this person tells me something totally different from what was asked).

Who has helpful information confirming that such a window is indeed possible WITHOUT a mullion?


Technical construction drawing with A–B section, thermal break, perimeter insulation, and dimensions.


Residential building façade with entrance, two adults and a child in front, bicycle on the left, yellow window frames.
rick201831 May 2020 12:13
Complete nonsense. The limit is 16 meters (52 feet) in one piece.
3-4 meters (10-13 feet) is no problem. We have over 5 meters (16 feet), movable and frameless.
C
Curly
31 May 2020 20:29
The glass panels of our patio roof are just over 4m long (13 feet). I guess it might depend on the thickness of the glass?
I just read online that there are even 18m panels available in one piece (59 feet).

Best regards,
Sabine
rick201831 May 2020 21:20
18-meter (59-foot) windows or a patio roof? There is a difference. I know of a German glass manufacturer that produces up to 16 meters (52.5 feet). There might be others who go even further. But in any case, the size of the TE is not an issue.
M
Muc1985
31 May 2020 21:54
Definitely, the desired size (without partition) is not an issue...
11ant1 Jun 2020 00:44
We recently encountered this issue: https://www.hausbau-forum.de/threads/wie-gross-kann-eine-einteilige-fensterflaeche-sein.32418/ – it was about 2 x 2 meters (6.5 x 6.5 feet), and, in my opinion, while the concern may be somewhat overly cautious depending on taste, the critical point that cannot be entirely dismissed is the distance from the center of the glass pane to its corners. In this case, due to the smaller width, I see it as more favorable. However, I suspect the bottleneck lies elsewhere, namely in the profile length: machining equipment is often designed for profiles up to only 240 cm (94.5 inches) in length. Since it would indeed be unstable to fit a single-pane glass into a two-part frame profile, I understand the concerns—though they should be stated more transparently.
derChaos78 schrieb:

This division does not fit the façade concept at all!

Mentioning the lofty word "concept" in relation to this façade, however, made me chuckle out loud.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
H
hampshire
1 Jun 2020 22:07
These custom-sized panes always pose a risk for installers—mistakes can be very costly, as can warranty claims. It’s better not to offer them or to charge a high price, especially if the glass is exposed to long periods of sunlight and involves triple glazing. I would only accept a division if the muntin aligns with the entrance door or indicates the floor height.

We had a similar discussion, and the muntin solution turned out well. There is an opaque panel that covers the floor of the gallery, which would otherwise have been visible from the side—see the end face in the photo.

Wood house with balcony in front of autumn forest and blue sky