Plasterboard directly on fiberboard wall?

[Kålly]

Planning to renovate a small room. There is old masonite on the walls. If you attach renovation plasterboard directly over the masonite, is there a risk that the plasterboard will crack when it expands, or is the board somewhat flexible? I don't really feel like I have the time now to take down all the walls in the little room.

 

[samlarpådetmesta]

Why should you have plaster on the walls?

 

[Interista88]

He probably wants plaster, and it's nicer than masonite

 

[samlarpådetmesta]

He probably wants plaster, and it's nicer than masonite

I was thinking more about the end result. Will it be painted or wallpapered or what will be done? Is the masonite broken? You can't see if it's masonite or plaster when it's finished.

 

[Kålly]

Going to paint. Was thinking if that gypsum is a bit more durable than renovation wallpaper. Masonite buckles at the slightest moisture and shows through the renovation wallpaper. Just wondering if there is another "quick" alternative with decent results.

 

[mxjolle]

Also curious as we have painter's fleece/renovation wallpaper on 13mm building board and it looks downright awful now after almost 3 years.

I'm thinking of ditching the building board and putting up gypsum when renovating room by room.

I have a room with remaining building board and renovation gypsum that has a much better surface.

 

[Pugetik]

Same question found here but I'm going to have a new shower room. So our house is built in 1946, so the walls are just 50 mm thick old healthy wooden boards with 3 mm masonite covered with ordinary wallpaper (I tore off a piece of masonite to see what was behind it, thought it was tetrex board but no, it wasn't.

Has additional insulation externally)

Maybe risks that the wallpaper is slightly damp so maybe best to remove the masonite completely, right?

Is there anyone who definitely knows what to have or do right....?

What I was thinking is that it doesn't need to be age-resistant so just lay special gypsum boards directly on the masonite walls and then with a waterproofing layer. Then have a wet room mat on both the floor and walls.

Also, have a bathroom fan there. Then it should work well, so I don't think there would be moisture damage inside behind the gypsum wall in the future... but can imagine how the house's movement wall if gypsum boards can crack if you screw them on masonite and wooden boards?

Appreciate if any expert can answer and/or if there is something one can read even though I have searched but most instructions are mostly for new building/extensions...

 

[Micke R.]

Hello. The masonite cracking the plasterboard is probably not a concern. However, the plasterboard follows the movements of the masonite, which results in a buckled/uneven wall. Regards

 

[Micke R.]

Same question found here but I’m going to have a new shower room. So our house was built in 1946, so the walls are only 50 mm thick, old healthy wooden boards with 3 mm masonite covered with regular wallpaper (removed a piece of masonite to check what’s behind, thought it was tetrex board but no, it’s not,

There is external insulation)

Maybe there are risks that the wallpaper is slightly damp so maybe best to remove the masonite completely or what?

Does anyone definitely know what to have or do right...?

What I was thinking is that there’s no need to lay aging-resistant sheets, just lay special gypsum boards directly on the masonite walls and then with waterproofing. So I'm going to have wet room mats on both the floor and the walls.

And have a bathroom fan there. Then it should work well, and I don’t think there would be moisture damage behind the gypsum wall in the future... but I can imagine how the house movement wall might cause the gypsum board to crack if you screw it into masonite and wood boards?

I would appreciate if an expert could answer and/or if there is anything one can read despite searching but most instructions are mostly for newbuild/extensions...

Hi. I would remove the masonite as it retains moisture. You don’t need a moisture barrier if you’re going to have wet room mats on the floor/walls. Regards