You either do it the right way and install OSB with small gaps (they are a few millimeters narrower than other boards), or you do it like me and ignore that and just slap the boards up.

Both methods seem to work well without the walls bulging out....or in.
 
I also went ahead like Mathias, it works well! It's worth mentioning that I am so slow (read thorough) that the OSB probably had time to dry anyway ;)
Some tips:
* Glue the OSB to the studs (I didn't think of this)
* Fully screw both OSB and plasterboard
* Regular drywall screws work excellently with OSB, which makes it cheap
 
Is it possible to nail OSB with a nail gun?
 
What is OSB? Something I should use.... ;)
 
It is a kind of fiberboard that is pressed in a plywood-like manner. Looks like a mixture between plywood and chipboard. Somewhat cheaper than construction plywood.
 
;) Looks like this:

osb.jpg
 
MagnusS said:
...That thing about glue doesn't feel right, because then I get something big that moves relative to the plaster.
Chipboards should be glued to the studs and preferably edge to edge. This according to the construction description from the manufacturer, e.g., Byggelit. Also recommended by carpenters when there is plenty of time for assembly. The glue rather locks the board in one position. Screws alone will probably not be able to "hold against it."
 
But OSB should not be placed against each other. How can they then be glued edge to edge?
 
sgryd said:
But OSB shouldn't be placed against each other. How can they then be glued edge to edge?
I was commenting on MagnusS's general opinion that glue doesn't "feel right." I'm unsure about OSB. The surface is often waxed, so the question is whether the glue might lose its grip after a couple of years. Maybe someone else knows....
 
MagnusS said:
...but glued chipboard that moves together with rigid gypsum doesn't seem ideal....
They don't move...not measurably at least. At the same time, it becomes incredibly solid walls.
 
MagnusS said:
Then the next question is, how much better is gypsum+OSB than double gypsum?
You get a bit more to screw into.
 
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