Window venetian blind box - Please ask for tips

We are finished with the planning for the most part. The building application has been submitted. Now it goes into the details.

We started with the windows and are stuck. I hope you and especially you can help us.

It's about our floor-to-ceiling aluminum windows in the main room. Both are planned as lift-and-slide door windows. Clear ceiling height 270 cm, window height 240 cm. We do not want a corner window – the static calculations would be too complicated. It was agreed with the structural engineer that a 24x24 concrete support column plus insulation will go into the corner. (The picture still shows a longer masonry wall – but this will be changed.) Which solution should we choose for the roller shutter boxes?

a) Recessed box matching the masonry made of Poroton. The problem here is the lack of bearing surface on the side of the concrete support.
b) Recessed box made of EPS (36.5 cm, width matching the brick), which is flush with the window, meaning it does not need a bearing surface.
c) Double the window by 30 cm and use a 15 cm wide metal roller shutter box. This could then be ordered either recessed or facade-flush with a visible metal cover.
d) Instead of doubling the window frame, install an approximately 18 cm wide lintel: 3.5 cm EPS + 15 cm metal roller shutter box
....

Of course, we would prefer floor-to-ceiling windows in the main room – 270 cm. Leaving aside the additional costs now... With this solution, I could only take surface-mounted roller shutters.
What do you think? There would be an undeveloped southwest side in front with a large field/orchard meadow. How do surface-mounted roller shutters behave in the wind?

Do you perhaps have another solution? – what do you think as an expert?

What you are looking for is a flush-mounted box. You should have described it in variant B.

Floor-to-ceiling window with covering is not possible in monolithic masonry, except surface-mounted.

The problem with the lift-and-slide door is the relatively large frame proportion. So quite a bit is deducted from the window height (get profile cuts!). However, 2.4m is generous and should be sufficient. We have 2.25m – and I would be glad about every centimeter more. Floor-to-ceiling would be too much effort and is also unnecessary at 2.4m.

Floor-to-ceiling window with covering will not work in monolithic masonry, except surface-mounted

Yes, I suspect so too. A high-end solution might be possible, but not necessarily.

I know, 240cm is high enough as well. The question is which box solution is best. I often see discoloration/mossing in the box area, of course there is a certain thermal bridge (here the surface-mounted solution would definitely be better).
How should I best "fill" the 30cm above the window then?

Or a curtain wall. You can fit it in there too. :p

Or a curtain wall. You can fit it in there too. :p

Don't be cheeky... ;) I want to treat myself here to something "luxurious" (see: taller windows) in the place as cheaply as possible, and you come at me with a curtain wall... :cool: