Old interior wall panels

[Timppa63]

Hello
We are renovating our summer cottage, and I wonder how to do it...
We are considering installing renovation plasterboard on the wall, but we wonder if we should remove the old board which is about 1 cm thick and resembles gullfiber boards with a paper surface. Under this board, there are horizontal planks; I assume the house is insulated with sawdust between the outer and inner panels.
You can't paint or wallpaper the existing one, and it doesn't feel 100% fresh either.

Anyone know? Remove the board, or leave it???
Thankful for answers
Best regards
Timo

 

[Wodie]

Remove the board and put plaster on the boards. If you put plaster on those kinds of boards, it has happened that after a while, the board moves a little so that the screws in the plaster come out of the paint/wallpaper.

 

[Timppa63]

Ok thanks for the answer! Byggahus is awesome!
One last question, should I have wind barrier/plastic or something else between the boards and the gypsum? As it is now, the house isn't heated during wintertime (summer water).

 

[cheetah1]

Nonono, for god's sake, no plastic.
Keep the råsponten, but feel free to remove the tretexen. There's actually nothing wrong with it, if you can get a good surface you can wallpaper on it, but it's a little more flammable than drywall.