ᐅ What is the maximum size of a single-pane window?

Created on: 24 Sep 2019 10:05
G
Golfi90
Hello everyone.

Yesterday afternoon, we had a conversation with our window installer, who was commissioned by the general contractor.

It concerns a gallery window with a rough opening size of 201cm (79 inches) width and 213.5cm (84 inches) height.

The window is fixed glazing.

He claims that he cannot supply the window as a single piece, but only in two parts.

He justified this by referring to a standard, stating that a window can only be deflected by 8mm (0.3 inches) if wind pressure is applied, and so on.

Is this all correct? Or does he simply not want to install such a large (and possibly heavy) window?
H
hampshire
24 Sep 2019 15:05
Of course, it is generally possible to construct such windows as a single unit. However, this must be structurally planned and budgeted for. I believe the discussion depends on these two factors.
Golfi9024 Sep 2019 15:14
Well, when I configure the windows online with the leading suppliers, the single-pane window is actually cheaper than the two-pane one...
H
hampshire
24 Sep 2019 15:23
The window itself, maybe, but what about transport and professional installation with a warranty? Total costs are important. Individual prices only matter if you are buying separate components.
11ant24 Sep 2019 15:27
Depending on the exposed location, the argument about wind load is not nonsense and, assuming the unitary design, it is "valid" – a communication problem probably exists, and the two-part design was not recognized by the window manufacturer – possibly because the general contractor wanted to save costs and requested it without a mullion?
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Golfi9024 Sep 2019 15:32
I think you are somewhat off-topic.

The general contractor requested a two-part window with a central mullion. Otherwise, how would a division into two sections be realized?

However, we would prefer to have it as a single unit.
11ant24 Sep 2019 15:50
Golfi90 schrieb:

I think you’re somewhat missing the point.

No, you said it was the one from the profile picture – and that one has a central mullion.
Golfi90 schrieb:

But we would prefer it to be one single piece.

Then the window manufacturer is right, speaking as a window factory owner who handled complaints personally. The crane also comes into play; nobody carries a single large piece up the scaffold. So, without a central mullion means a more expensive installation, and if you were my customer, I’d add an extra two weeks of waiting due to cancellation policy related to warranty exclusion. All that just to enjoy an unobstructed view of the street from an internal balcony? – you don’t treat yourself often, I guess.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/