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Hello,

I plan to rebuild 2 partition walls that are currently constructed with 45x70 studs and 13mm plasterboard on each side, which makes the walls feel incredibly unstable and all sound leaks through.

The idea is to save one side's "walls" and rebuild the wall from one side. (See image).

I would like to ask for your recommendations regarding the method and choice of materials to make the walls more stable and properly soundproofed.

Best regards,
 
  • Partially demolished interior wall with exposed wooden studs, a wooden door on the left, a metal ladder, and a ceiling light fixture.
I had placed noggings between the standing studs. Then screwed OSB boards under the plasterboard.

Have you had insulation in the wall before? Otherwise, that will take away a lot of sound. Regular mineral wool should work well.
 
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Nilstyko Nilstyko said:
I would have placed noggins between the vertical studs. Then screwed OSB boards under the gypsum.

Have you had insulation in the wall before? Otherwise, that will take away quite a bit of noise. Regular rock wool should work well.
You mean OSB under the gypsum that is going up then, I assume?

No insulation has been there before.
 
Scj said:
You mean OSB under the plasterboard that's going up, I assume?

No insulation was there previously.
Exactly, under the plasterboard that's going up.

Then insulation will make a big difference😃
 
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Nilstyko Nilstyko said:
Exactly, under the plaster that needs to go up.

Then insulation will make a big difference😃
Absolutely! That was what I had in mind, but I was wondering if there might be another type of material that insulates even better. 😊
 
Possible that there is. But stone wool has good sound insulating properties, better than glass wool, if I remember correctly. I think it will suffice if it's a "normal" room in a residence.

But if it's a night owl drummer who will be hanging out in the room and practicing, then 70 mm stone wool won't be enough.
 
Isolate carefully, seal roof, floor, wall angle, double gypsum. Then you have a completely okay wall. It's best if you can leave a bit of air between different wall layers, but then the wall quickly becomes very thick.
 
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Thank you for all the suggestions! It will be fiberglass > OSB > plasterboard and noggings. Now to something else.. I discovered that 2 of the studs are incredibly warped, the dimensions are 70x45. Is there a way to straighten them without tearing down the entire wall?

Best regards, s
 
  • Close-up of a skewed wooden beam with a jagged cut, surrounded by construction debris on the floor and tools like a hammer and measuring tape nearby.
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T
I would say you have two different "problems" that to some extent require different solutions.

If soundproofing is important, two layers of drywall are better than OSB-drywall, and if you decouple both sides of the walls, you avoid more sound transmission (i.e., install more studs that are staggered and where every other stud supports the boards on one side and the others support the boards on the other side), but it makes the wall thicker and can be a bit "tricky." Heavier insulation like rock wool dampens better than fiberglass.

Stability: here, OSB+drywall and blocking are a good solution, giving you walls that can withstand impacts without much happening. It also makes it easier to hang things on the walls.

The bent studs you ask about are difficult to straighten. You might be able to plane down the exposed side to remove the bulge on one side of the wall, but the other side is what it is. Otherwise, you'll need to replace them with new ones. On the other hand, that will damage the drywall, so it must be replaced along with new wallpaper/paint on that side as well.
 
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MrBusch
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T Testarn said:
I would say you have two different "problems" that to some extent require different solutions.

If soundproofing is important, two layers of drywall are better than OSB-drywall, and if you decouple both sides of the walls, you avoid more sound transmission (i.e., placing more studs that are staggered, with alternating studs carrying the panels on each side) but this makes the wall thicker and can be a bit "tricky."
Heavier insulation like stone wool dampens better than fiberglass.

Stability: here, OSB+drywall and cross-bracing is a good solution, it provides walls you can throw yourself against without much happening. It also makes it easier to put things up on the walls.

The bent studs you ask about are difficult to straighten. You might be able to plane down the exposed side to remove bulges on one side of the wall, but the other side is as it is. Otherwise, you'll have to replace them with new ones. On the other hand, this will damage the drywall, so it has to be replaced, and new wallpaper/repainting on that side as well.
Okay, then it might be that I'll change fiberglass to stone wool, but the local store only sells 40, 90, and 140 thickness stone wool boards, so I guess I can take the 140 and split them by thickness to double the output from each board? 😊

It will be OSB and drywall, no air gap since it builds too much.

I'm leaning towards replacing the studs and redoing the wall on both sides instead, even though it's not something I'll see when it's done, I know I'll be annoyed by the knowledge that it's crooked.
 
What do you want to achieve specifically? In other words, what requirements do you have if the wall is to be rebuilt?
 
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L Liljeros said:
What do you concretely want to achieve? That is, what requirements do you have if the wall is to be rebuilt?
really nothing more than soundproofing and a stable wall, looking aesthetically correct is just a bonus
 
It's fine to share the insulation. Just a bit more work for you.

I recently read about fibergipsskivor, which apparently have the same soundproofing in one board as two regular ones. I have no experience with these, but it seems good for your purpose.
 
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Nilstyko Nilstyko said:
It's fine to share the insulation. Just a bit more work for you.

I just read about fiber plasterboards that apparently have the same soundproofing in one board as two regular ones. I have no experience with these, but it seems good for your purpose.
Awesome

Regular 13mm gypsum was purchased yesterday, so that'll be it this time, but I have a bunch of walls that need to be rebuilt in the future, so I'll take a look at fiber plasterboard then!
 
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Scj said:
really nothing more than soundproofing and a stable wall, looking aesthetically correct is just a bonus
For any solutions that are more extensive than simple plasterboard and some insulation, like 45-70mm, the door will immediately become the limiting factor.

However, if you want the wall itself to be somewhat sturdier, an extra layer of plasterboard is a good way to go. If you want to easily screw up lots of things, it helps to have OSB, but it has worse sound performance than plasterboard. Any constructions that are more extensive than 2 layers per side, some insulation, and a 70mm stud in an ordinary house are not particularly meaningful as the sound will still find other paths.
 
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