Questions about drywall installation on walls

[Klicka]

When installing OSB, you should leave 2-3mm between the boards for movement allowance.

A bit tricky with expansion gaps. Since the OSB board is screwed into the studs. If they are steel studs, they don't move with moisture like the board does.

If that were correct, OSB would only be screwed in the middle of the board so they can move freely to the sides. But then they wouldn't be fastened well.

I've looked at construction plywood. They don't require expansion gaps, they are 1200mm wide. But a bit more expensive.

 

[FredrikR]

I have a hard time believing that OSB wouldn't work on metal studs, just leave a ruler blade thickness gap between the boards.

 

[droopy]

Remove the chamfer in the corners. I forgot it once. Cursed long rants afterward as it took a long time to get the filler right.

Horizontal sounds unhealthy, but it matches the Americans..
Then you have to cut the bottom chamfer. Cut the top if it doesn't fit the height. But if you have a ceiling height of 240, it can be smooth.
Vertical: no or maximum one cut.

If you have external corners, the chamfer is good as it makes it easier to fit the corner reinforcements, which you should always have on external corners. This way, there's less sticking out, and you avoid having to spread filler over a large part of the wall.

In internal corners, you can cut so that 13-15mm of the chamfer is left when meeting a full board from which you have cut away the ENTIRE chamfer. This makes it slightly tighter (against, for example, sound) since the boards overlap more.