Roller shutters during shell construction or built-in roller shutters with the window?

Hello,

we are currently facing the decision of clarifying with the shell builder whether we should include the roller shutter box directly in the shell construction (integrated roller shutter) or procure it together with the windows as one element (attached roller shutter).

I will inform myself about this next week, but in the meantime the preliminary question: What is the basic price difference between the two variants? Are attached roller shutters significantly more expensive?

Maybe by chance one of you is familiar with this topic.

Many thanks for your attention.

Why do you want an essay shop???

I do not want them consciously, but the shell builder recommended them because they are supposed to be better insulated

I do not mean [Vorbaurollläden], but [Aufsatzrollläden]. From the outside, these are plastered and there is no difference to be seen.