ᐅ Manually operated roller shutters – space above the window

Hello,

I would like to have exterior roller shutters installed. These will be box-type roller shutters mounted above the window on the outside. I prefer manually operated shutters. The technician from the company that took the measurements told me this is not possible because there is not enough space above the window.

On the upper floor, my windows actually go almost up to the ceiling. There is only 7 cm (3 inches) of space up to the ceiling. Is it correct that this is not enough space to install manually operated roller shutters?
Unfortunately, the technician could not explain well why this is the case, and I got the impression he preferred to sell the more expensive electrically operated ones.

Can anyone tell me how much height above the window is required to install box-type roller shutters that can be operated manually?
Thanks in advance!

Well, roll something flat onto it. What diameter do you think it will have?

I don’t know how this is done technically. The rolled-up tape is certainly not thicker than the rolled-up roller shutter inside the box at the top. Where exactly is the rolled-up tape located?

Straps themselves should be redirectable as well – I’m missing the overall concept of the installation situation, especially one where the issue would only be with the straps and the box installation would be unproblematic.

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Our manually operated built-in roller shutters have exactly 20cm (8 inches) above the windows...

I finally got around to taking a photo. You can see here that the ceiling starts just a few centimeters above the window. Apparently, that’s not enough space for manual roller shutters. 🙁