That's why I asked. But if he wants privacy screen so that the neighbor can't look at his plate from 4 p.m. in winter. Then the risk is greater that the shutters will go up when it's windy.
The facade is not that bad now, does it have an offset?
The advantage of the screens is the low installation height, meaning a small box, and they are NOT susceptible to wind. The light transmittance can be chosen by the selection of the fabric. The disadvantage is that they are more expensive and you cannot control the light incidence like with a venetian blind.
Ours are too new to have experience with mold. However, one or two screens have wrinkles, I hope this is somehow a matter of adjustment.
Do you want recessed boxes or surface-mounted boxes? Then you have to hurry.
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Inspired by your window, I would also be interested in the house. Do you have pictures you want to show us?