Luminous room height and window height. Provider standard 262.50 cm

We have a room height of 2.70 m and [2,40 m Fenster]. We like it very much and it looks harmonious.

Now I actually checked the living/dining-cooking room of my apartment. Clear room height 260 cm, the window recesses end at about 245 cm .. because we don't have [Rollladen] or anything (I'm glad about that .. I don't like [Rollladen], they always look like a fortress).

That may be the case, but it doesn’t have to be. Often, you have to consult sectional drawings because it is not specified in floor plans what the measurement refers to.

For roller shutter boxes, about 30 cm height is usually estimated if they are to be delivered connected with the window. About 30 to 40 cm distance to the ceiling is a good measure if the windows should not look raised too high or visually pull the ceiling down.

In any case, I advise always adjusting room height and window height together. Increasing the room height by about 20 cm (this does not necessarily have to be in 12.5 cm increments) and leaving the window height at the standard dimension would have the described effect of placing a shadow threshold in the way of the light toward the ceiling.

The 226 cm is the raw construction measurement, according to the sectional drawing.
We definitely want roller shutters, so we must definitely include the 30 cm.

If I now take the raw construction height of the room as 275 cm - 30 cm for roller shutters = max. 245 cm raw construction measurement for windows.
What about lintels, are they needed for certain windows? For example, we have planned a 3 m wide sliding door... that would reduce a few more centimeters, right?
If not, is my calculation correct, and with a 275 cm raw construction ceiling height I could take a max. 245 cm window in raw construction measurement (I would probably take slightly less anyway because it is still somewhat high)?

The 226 cm is the raw construction dimension, according to the sectional drawing. We definitely want roller shutters, so we absolutely have to include the 30 cm. If I now take the raw construction height of the room as 275 cm - 30 cm roller shutters = max. 245 cm raw construction dimension for windows.

From the sectional drawing, it should also be visible whether the lintel comes at the upper edge of this opening or the roller shutter box first. What I wrote referred to roller shutter boxes attached to the window element - but classic separate roller shutter boxes are just as often installed (and then the window dimension is specified in the drawing).

What about lintels, do you need them for certain windows?

Lintels are not needed for their own sake, but only if you want a piece of wall above windows or doors. Otherwise, the ceiling can also span there freely – but only to a certain extent. Over wide windows/doors, a beam in practically the same dimension as a lintel will be required.

If not, then is my calculation correct, and with 275 cm raw construction height ceiling I could take max. 245 cm windows in raw construction dimension

You are worrying a bit too much about what the professionals think. As a builder, you should clarify for yourself what you want. And in my opinion, you do this best by asking whether you want the windows to be correspondingly higher with 20 cm more room height – or rather (regardless, as a secondary matter, of what is roller shutter box, lintel, and wall above) prefer to effectively have about 60 cm of "upper parapet" standing in front of the room ceiling. That is your fundamental decision – how to implement it, you can confidently leave the professionals to puzzle over.

If not, is my calculation correct, and with a shell construction height of 275 cm ceiling, could I take a maximum of 245 cm window in the raw construction dimension (probably I would take a little less, because it is somewhat high then)

Above the roller shutter, we still have about 5 cm wide lintels, so we come to about 35 cm above the window. Additionally, the screed must also be taken into account.

Best regards
Sabine

Ever thought about integrating the roller shutter/blind box into the facade? Then you wouldn't need a lintel at all and would have maximum brightness in the rooms