ᐅ Interior walls using drywall construction

Hello everyone,

As mentioned in some other threads, we are building our single-family house with Massivhaus Mittelrhein.
Since we have a very large ceiling span in the living room, the structural engineer suggested the following:

The interior walls on the upper floor will be constructed with drywall in some rooms. This is intended to reduce the load on the ceiling. Alternatively, a crack-bridging plaster mesh will be applied to the interior walls. However, there is still a risk that cracks may form.

I am now quite uncertain about what to do and whether this makes sense, and I would appreciate any support.

Best regards

M.arco

To what extent are you skeptical? Can you phrase a question?
Is it regarding drywall installation or crack formation?

M.arco schrieb:
As I have already described in some other threads, we are building our single-family house with Massivhaus Mittelrhein.

I could not find the design here, so it is difficult to discuss the individual case.

M.arco schrieb:
Since we have a very large ceiling span in the living room, the structural engineer suggested the following:
The interior walls on the upper floor will be constructed as drywall in some rooms. This is intended to reduce the load on the ceiling.

Reducing weight above areas where there are no walls on the floor below (at this position) makes sense. I agree with this first, and secondly I get the impression that this provider plans carefully (so I assume the suggestion is well considered). However, I do not understand in the following paragraph

M.arco schrieb:
Alternatively, crack-bridging plaster mesh is applied to the interior walls. However, there is still a risk that cracks may form.

at least what is supposed to be "alternative" about this. Crack-bridging mesh is used where building materials with different shrinkage or expansion behavior meet, for example drywall walls connected to masonry. It would likely be used in connections of calcium silicate blocks to porous bricks as well – but calcium silicate blocks would probably not be considered if weight reduction is desired here. This raises the question for me:

What wall materials are generally planned here? – as far as I know, for exterior walls this provider prefers aerated concrete (which is also a lightweight material).

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Good morning everyone,

I am skeptical about the sound insulation, whether there is generally a structural issue, and whether cracks can still develop.

The alternatives being considered are:

1. Drywall partitions instead of solid interior walls, 11.5 cm (4.5 inches) thick
2. Solid interior walls with additional crack-bridging mesh, which is generally not recommended.

I wonder why the intermediate ceiling simply isn’t made thicker...

Best regards

M.arco

Drywall partitions can be relatively comparable to masonry interior walls, depending on their construction. Of course, it depends on the materials used, but drywall interior walls are now widely common.

From my own experience, I can say that the walls are only somewhat more sound-permeable when you knock on them with your hand. Otherwise, they behave normally and are also airtight.

We also have drywall on the upper floor. We see no disadvantages. @markus2703 described it very well.
If there is any noise, it comes through the doors or through the windows on the exterior.
The areas where drywall meets masonry are always subject to movement and will develop cracks after some time; these should be sealed with acrylic.