ᐅ Interior wall cladding with drywall (gypsum board), fiber-reinforced gypsum panels, or OSB?

Hello everyone,

We want to renovate the interior of our old barn / garden shed, which has a 30° (30°) pitched roof. The base walls are made of wooden studs. Between the wooden studs, there are fiberboard panels (about 8cm (3 inches) thick). The previous owner had drywall panels installed and wallpapered. We have now removed all of these.

Our wishes:

• The wall should become almost completely white. Ideally, plaster could be applied, but a simple white paint would also be possible. Wallpapering is also an option, though it should rather be the last choice.
• On two sides, we want to attach items to the wall. (If necessary, it might be possible to position the fixings to hit the wooden studs.)
• The most important point: When the entrance door is slammed hard, slight vibrations can be felt on the wall.
• I am concerned whether the surface layer (plaster, paint, wallpaper) might develop cracks because of this.
• Although the room is not damp, it is a garden shed where all four walls are exterior walls. There is also a kitchen / cooking area inside, where (although only a little) vapor can be produced.

Which type of panels would you recommend here? Should they be screwed directly to the wooden studs, or would it be better to build an additional substructure to stiffen the walls (at least a bit)? (Price and ease of installation for these three types of panels do not matter at this point.)

Best regards

What you wrote suggests using an OSB board (e.g., 18mm (0.7 inches)). This will stiffen the wall, and with the fasteners, you won’t have any issues.

Thank you, I am currently leaning more towards OSB, but with 22mm (7/8 inch) thickness for the walls and gypsum board for the sloped ceiling. I am researching whether the joints of the OSB panels might cause issues, such as cracks, and how to apply the top layer. (Mainly to minimize swelling caused by the top layer, like paint, textured coating, or plastering).
If necessary, a double layer of sheathing would also be an option.

One last question, hopefully about wall cladding:
Which option would provide greater rigidity for the walls? If I install the OSB panels vertically, I don’t have many possibilities to screw into the timber studs, see attachment.

Definitely perpendicular. Whether directly on the joists depends a bit on how level the whole setup is. What does the plaster batten test say?

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Yes, the walls are waterproof.
Alright, then this forum thread has been clarified for me. I will start installing the panels horizontally. The design of the top layer is a separate matter that I will have to decide on myself, considering all the pros and cons.