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derChaos7831 May 2020 09:31Hello 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?


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?
In my opinion, that is nonsense. I have already seen glass elements with triple glazing up to 10-15 meters (33-49 feet).
Perhaps the system used by the company or the requested manufacturer does not offer this—but I believe it is incorrect to say that such a thing does not exist at all.
Perhaps the system used by the company or the requested manufacturer does not offer this—but I believe it is incorrect to say that such a thing does not exist at all.
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derChaos7831 May 2020 10:46Thank you for your response. That already helps.
From my experience, it primarily comes down to price, the appropriate window system, and installation costs (crane, etc.). For large elements over about 2.50m (8 feet 3 inches), uPVC windows generally reach their system limits (which vary depending on the window profile manufacturer).
Yes, that definitely exists. We also have a window about 65cm x 500cm (26 inches x 197 inches). We were asked whether it absolutely had to be in one piece and intentionally chose a central division. The problem is simply the installation; companies don’t really like doing it, and of course, it costs more. But the excuse is nonsense—we could have had our 5 meters (197 inches) in one piece as well.
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