Is the wall load-bearing? - renovating the laundry room

[amoreex]

Insulation in internal walls is used not for thermal but acoustic reasons

yes exactly!
But the question is how much sound 45mm insulation reduces. And if it's worth the effort to remove the raw wood for it. And replace with OSB or plywood.

 

[Finndjävel]

45mm insulation does not provide much soundproofing. However, it might reduce some of the vibrations and noise from the washing machine.

You don't need to replace the råspont, do you? You can reuse it.

If you don't find the wall to be noisy, the insulation probably won't do much to dampen the sound. I would rather put one or two layers of gypsum board on the wall and use sealing compound (acoustical sealant) in the joints. That will do significantly more than insulation. It is primarily weight that soundproofs.

 

[amoreex]

45mm insulation does not provide much soundproofing. However, it might remove some vibrations and noise from the washing machine.

You don't need to replace the råspont, right? You can reuse it.

If you don't find the wall noisy, then the insulation probably won't do much to dampen the sound. Instead, I would place one or two layers of drywall on the wall and use sealing compound (acoustic sealant) in the joints. This will do much more than insulation. It is primarily weight that soundproofs.

okay!
Sounds like the easiest thing is to skip it...

I found the råspont difficult to remove whole on the other wall..
So I ended up cutting it with a reciprocating saw...

it's stapled

 

[sturnus]

45mm insulation does not provide much soundproofing. However, it might slightly reduce vibrations and noise from the washing machine.

You don't really need to replace the råspont, do you? You can reuse it.

If you don't find the wall noisy, the insulation probably won't do much to dampen the sound. Instead, I would prefer to add one or two layers of drywall to the wall and apply sealing compound (acoustic seal) in the joints. This will make significantly more difference than insulation. Primarily, it's mass that soundproofs.

I don't know where you got this information from. This is clearly not true. A wall without insulation acts as a sound box. Sound is a wave. Having nothing in the way, one side of the plaster will affect the other, i.e. the other side will act like a loudspeaker diaphragm. And sometimes, like a loudspeaker, it can amplify the sound. An effect used in many musical instruments. When you put 45 mm of insulation in the wall, this wave is dissipated and is definitely quieter. Of course, 45mm studs do not provide much stability, so the wall transmits the sound as a whole wall, but an insulated one will always be much quieter. Besides, your solution with double plasterboard is more expensive and the effect will not be better

 

[Finndjävel]

I don't know where you got this information from. This is clearly not true. A wall without insulation acts as a sound box. Sound is a wave. Having nothing in the way, one side of the plaster will affect the other, i.e. the other side will act like a loudspeaker diaphragm. And sometimes, like a loudspeaker, it can amplify the sound. An effect used in many musical instruments. When you put 45 mm of insulation in the wall, this wave is dissipated and is definitely quieter. Of course, 45mm studs do not provide much stability, so the wall transmits the sound as a whole wall, but an insulated one will always be much quieter. Besides, your solution with double plasterboard is more expensive and the effect will not be better

Jag sa inte att det inte dämpar. Det dämpar men bara marginellt. Råspont (wood) är inte samma som att ha en ihålig vägg med gipsskivor (plasterboard). Råspont är ganska mjukt och poröst. En tom vägg med gipsskivor kommer att bli som en trumma som förstärker vissa frekvenser. Den här väggen kommer inte att bli det.

Extra skivor på väggen ovanpå råsponten kommer att göra betydligt mera för att dämpa ljudet än att isolera med mineralull i tomrummet.
Jag är utbildad inom ljudteknik om du nu undrar varifrån jag fått idéerna.