Where does the misconception actually come from that it is much cheaper if as many window surfaces as possible have the same measurements?
Not a misconception, have been a window manufacturer.
I think it’s because the explanation why it is hardly more expensive sounds plausible in the first step (less wall, insulation, plaster, no window sills, possibly without French balcony, since the lower element is fixed, etc.)
I didn’t mean the trade-off between window area vs. wall area, nor normal parapet height vs. floor-to-ceiling windows.
And by the way, I didn’t only refer to the economic dimension, but also to the architectural one. In some rooms you look out on several sides, and from outside you see two facades simultaneously from many perspectives. And then you see, for example, eleven windows at once. If the seven have different formats, no “order” can be created stylistically; it always ends up looking “colorful” like Haribo Colorado.
For example, here on the garden side, the module dimension of the sliding door windows is one and a half times — thus disproportional to two or three pieces — coordinated with the module dimension of the upper windows. Then there is the coordination of center top over edge bottom. It looks “random,” but someone actually thought about it.
Technically speaking, a window is not just a window. Different window width also means different lintel width, and the reinforcements have to be calculated differently. Everywhere that only costs “a buck,” but it adds up. Where you expressly want a different format, I therefore don’t advise against it. But out of carelessness, without intention and also without a felt advantage, I wouldn’t dimension windows differently. By the way, here on average each format only appears three times — so no exaggerated monotony.
Every window has its price, which is calculated from the frame in running meters, the glass in m2, and the installation. If the window is smaller, it is cheaper.
You are right about that, many window suppliers have meanwhile switched to this calculation. What can make sense — assuming the standard type of window — is to deliberately choose “common stock sizes.” So for example, single-leaf in “110.”
But we also decided against floor-to-ceiling windows upstairs because from our point of view no floor-to-ceiling window belongs in child 1’s room.
Personally, I partly perceive floor-to-ceiling windows as a “Hoppenstedt-has-that-too product,” with which you can actually take the special character away from your house.
I basically like the floor plan too.
However, it stands and falls with the decision to have the stairwell in the living area without necessity. I would never accept that given the external dimensions. The stairs belong in the hallway, except in a 5m row house where there simply is no alternative.
I read the “accusations” against the open living room with stairs here as a compliment that you don’t even see the house’s footprint. From that point of view, it’s not a row house, but about a semi-detached house.
Besides: if they have to go through the living room, you see the kids regularly even in their teenage years.