ᐅ Bathtub in front of window – What is the recommended sill height?

Hello!

We have a timber frame shell construction (including windows and screed) completed.
The bathtub should be positioned in front of the window, which is 150 cm (59 inches) wide and 148 cm (58 inches) high, so that the top edge of the bathtub is level with the tiled window reveal. The tile thickness is 12 mm (0.5 inches). So far, so good. But:
The original architect’s plan specified a window sill height of 39 cm (15 inches). During the material selection meeting, we were told this was far too low and advised to go with 60 cm (24 inches). That was agreed on and the window was installed with a sill height of 64.5 cm (25 inches). Currently, the height from the screed to the window sill is 66 cm (26 inches). This will not change after tiling. This is much too high for the bathtub...
Since this was the company’s mistake, we will insist that the window be lowered (a kitchen window is being lowered due to a similar error as well).
However, what is the correct height? I would appreciate suggestions measured as "height from screed to window sill."

The bathtub is a Kaldewei Asymmetric Duo.

Note: The concealed wall faucet has already been installed. I’m not sure of the exact height, but it is relatively high...

Thank you and best regards

Faydie

You can also raise the bathtub.

The height of the bathtub can surely be found on the manufacturer’s website.

I know the height of the tub (can’t attach a picture right now/am only on my phone). But I don’t want to climb into 66 cm (26 inches). That’s just crazy. There’s also no room for a step :-/

The bathtub is usually placed on the unfinished subfloor, and the screed is then installed around it... so it would be a simple calculation:
The capping height (also the unfinished subfloor level) would be the bathtub height minus the tile thickness (if I understood correctly what you want).

I hope this refers to the ground floor.

No, the upper floor. I don’t want anyone watching me while I’m bathing. What difference does the floor level make?
I’ll try to upload the bathtub dimensions later.