Interior walls: masonry or drywall?

I am now convinced that with drywall, depending on the wall thickness, better soundproofing can be achieved. Unless you want to build 36.5 cm interior walls.

Of course, solid walls are better. Sometimes the world is that simple.

However, the walls should be erected immediately after the shell construction is completed, for example, during the roofing. Before the screed, the plaster comes, and before that, the rough installation of the electrical and sanitary trades will take place. I assume you also want electricity, water, and plaster on the interior walls.

Yes, but you can also lay the pipes etc. after the screed! That shouldn’t be a problem! Water pipes, bathroom drain pipe would then already be in place, it would mainly be about pulling electrical cables which you can run over the sloping roof before covering it with drywall

I think that masonry is actually a nice personal contribution. It would almost be the only work that I would personally enjoy (and that I could do reasonably well ...:rolleyes .

Undoubtedly, in my opinion, the interior walls are built together with the shell construction, completely, before the rough installation of plumbing and electrical. Everything else is nonsense ...

Which brick is being used for the exterior walls? I would base the interior walls on that. Otherwise, I’ll throw calcined sand brick into the mix. With the "right" shell builder, the house construction contractor, I would coordinate the connection of the interior walls to the exterior walls beforehand. You will need help for the door lintels. Maybe the shell builder can also lay the first row and you only build up from there. That of course reduces the savings potential but makes the topic considerably easier. (Are you building with a basement? The transition from interior wall to floor slab is a thermal bridge ...).

The self-labor must also be taken into account in the construction schedule.