Drywall construction: sequence suspended ceiling + pulling walls

Hello everyone,

we are currently in the middle of the complete renovation of our recently purchased house.

In the upper floor, the house from 1930 had a lattice framework under all ceilings and roof slopes, on and between which the plaster was applied.
We were not aware of this at all, but it became apparent when pulling out nails/screws from the ceiling - half of the plaster came off with them.
Conclusion: plaster and lattice framework removed down to the bare wooden beams.

Now we want to hang the ceiling with drywall and additionally build drywall walls for a new floor plan. The question I am asking myself now is: do I first erect the vertical walls for the new floor plan up to the bare wooden beams and then hang the ceiling, or do I hang the ceiling first and then build the drywall walls up to the suspended ceiling?

The first solution seems much more reasonable and logical to me (stability and soundproofing) - I still want to briefly double-check so that I know what I am doing ;) Thanks!

First walls then ceiling.

Has acoustic and stability advantages.

Yep, first walls then ceiling.

Can your project be admired in detail somewhere? We have been renovating our house from 1921 since 2017. In 2023, new drywall ceilings will also be installed and a wall will be demolished and rebuilt, but this time by a professional, otherwise we usually do almost everything ourselves.

and make sure to cover the entire ceiling with heavy painter's fleece wallpaper. In our apartment, the panels were only filled with an inserted fleece at the joints, and you can see every seam as a crack because the beam ceiling simply swings and moves too much.

and for heaven's sake, cover the entire ceiling with heavy painter's fleece wallpaper. In our apartment, the panels were only plastered at the joints with an inserted fleece, and you can see every seam as a crack because the beam ceiling simply swings and moves too much.

We don't have that problem at all, for example, even though we only plastered the ceilings (without joint fleece).

I will probably suspend the entire ceiling below the beams once with thin OSB and then cover it with drywall to increase the load-bearing capacity of the ceilings (if you want to hang something to sit on or so). I would have now plastered, sanded, and simply painted the drywall ceilings white or applied a textured roller finish – that's a good point about the cracks, I need to think about that again...