Interior wall cladding with Rigips, Fermacell, or OSB?

Hello everyone,

we want to reclad our old barn or rather our old garden shed including the 30° gable roof from the inside. The basic wall consists of wooden studs. Between the wooden studs are sauerkraut boards. (Approx. 8cm thick).
The previous owner had mounted and wallpapered drywall panels. We have now removed them all.

Wishes:

[*
The wall should be later completely white. Ideally plaster, but it could also simply be a white paint. Wallpapering would also be possible but should rather remain the last choice.
[*]On two sides, things are to be attached to the wall. (If necessary, one could try to place the fastenings so that they hit the wooden studs.
[*]The most important point actually: when you slam the entrance door hard, you feel slight vibrations on the wall.
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[*]Here I wonder whether the top layer (plaster, paint, wallpaper) might get cracks?
[*]The room is not humid, but it is a garden shed where all four walls = exterior walls. There is also a kitchen/cooking area inside where (albeit rather little) vapors can still arise.

Which boards would you prefer here? + screw them directly onto the wooden studs or create an additional substructure to stiffen the walls (at least a bit)? (Price and processing among these three types of boards is initially irrelevant)

Best regards

What you wrote indicates OSB board (e.g., 18mm). That stiffens the wall and with fastenings you have no problem.

Thank you, I am currently also leaning more towards OSB but with 22mm for the walls and drywall for the sloping roof. I am currently researching whether the joints of the OSB panels could possibly become a problem regarding cracks and how I apply the top layer. (Above all, to minimize swelling due to the top layer such as paint, roller plaster, or plastering). In case of doubt, double boarding would also be an alternative.

Last question hopefully on the topic of wall cladding:
With which variant would you have greater stiffness of the walls? If I place the OSB panels vertically, I don’t have many screwing options on the wooden stud, see attachment.

Definitely crosswise. Whether directly onto the beams depends a bit on how even the whole thing is. What does the [Putzlattentest] say?

Yes, the walls are in the water
Good, then this forum post is clarified for me. I will start to mount the panels crosswise. The design of the top layer is another topic, which I have to clarify for myself with all the pros and cons