ᐅ (Varying) installation depth of the window frame

Dear forum members,

The windows were recently installed in our new build.
We have some windows with roller shutter boxes mounted on top, and some with venetian blinds.
What surprised me a bit is the different depth of the window frames in the exterior wall. The frames for the roller shutters are noticeably set further out than the others (about 7cm (3 inches)).
Furthermore, I find the frames for the venetian blinds positioned quite far inside as well… there will also be insulation and plaster applied in front of them (a total of 16cm (6 inches)), and the frame is already recessed about 12cm (5 inches) inside. This means, in the end, it will be almost 30cm (12 inches) deep, and the sash frame will be even a few centimeters deeper from the outside.
Inside, the window frame is almost flush with the interior wall, so the windowsill inside will be very narrow (maybe 8–10cm (3–4 inches)).
Inside, all the shutter boxes are flush with the wall, which fits well. Maybe this is simply a structural issue?

I can’t quite imagine it yet, but somehow it might look odd from the outside if the window ends up being recessed this deeply?
Attached are pictures of both versions.

The venetian blinds require more space than roller shutters. As a result, the window will be positioned slightly further inside the room during installation. If these windows are on the same side of the house, this will be noticeable to those who know, look closely, or are professionals. Most people, however, will not notice.

hampshire schrieb:

Venetian blinds require more space than roller shutters. As a result, the window shifts slightly towards the interior during installation. If these windows are on the same side of the house, this will be noticeable to someone who knows what to look for or is a professional. Most people probably wouldn’t notice.

I understand that, of course. As a layperson, I would have thought that the windows with Venetian blinds could simply be installed further out, since there is enough insulation on the outside to cover any protruding boxes and guide rails. Currently, the window with the Venetian blinds is unfortunately installed very deep.

I would just like to know whether the different window depth constitutes a defect or is simply a technical requirement.

chrisw81 schrieb:

I understand that, of course. As a layperson, I would have thought that when installing the windows with external blinds, you could simply position them further out, since there will still be enough insulation applied on the outside to cover any protruding boxes and guide rails.
Currently, the window with the external blinds is unfortunately set very deep.

The concerns are completely valid—when using thick external insulation, the windows should be installed within the insulation layer.
However, this is quite complex and costly. If such a solution is not contractually agreed upon, there is nothing you can do about it.
It is not considered a defect.

I spoke with the homebuilder, and theoretically, it would be possible to move the windows with the external blinds further outward. However, this would leave only 5 cm (2 inches) of insulation in front, which the planner thinks could cause an issue with thermal bridging. They will clarify what might happen in a worst-case scenario. I wouldn’t mind heating a bit more, but mold and similar problems would definitely be a concern. Warranty coverage would also be reduced in this case.

There are often minimum cover requirements for the external venetian blind/shutter box in relation to the external thermal insulation composite system (ETICS). It is not possible to adjust it arbitrarily, aside from the thermal bridge issue.

People also don't seem to be sparing with expanding foam in that area...