Windows are smaller than in the building application/work plan.

What is "too small" there? After plastering? Shell construction? Dimensions in drawings always refer to the shell construction as well, how is it with you? And 6 cm on what? On a window of one meter or two?

Have you ever asked how the difference comes about?

Yes, we asked right after we noticed it. But the answer doesn't make any sense. Yesterday I read an old chat history. Now the discrepancy is clear. The height of the windows was apparently not taken from the building application, but from older plans.

The classic...sorry, nothing more can be done.

Once again, a topic horrifies me. As a layperson builder, do I really have to crawl into every construction corner every day and measure everything down to the centimeter? I simply do not understand this entire industry. I consider it standard practice to do one's job well, correctly, and error-free (with a few exceptions), but in the construction industry, it seems to be the opposite. Our prefabricated house construction will be accompanied by an independent expert, but by now I have the impression that one is not enough. Maybe additionally TÜV or DEKRA. I already find it absurd to have to measure every single window as the builder.

The classic... sorry, there's nothing more you can do.

In what way is it the classic? I'm asking because I would like to avoid the aforementioned situation.