Älvsbyhus, soundproof interior walls !!!

[Samsung]

Hello New to the forum,

I have an Älvsbyhus Lodur with interior walls measuring 45mm+10mm chipboard on each side, no insulation inside.

What to do to eliminate sound from adjacent rooms.

Open up one side, insert 45mm insulation, cover with either chipboard, OSB, plywood + single drywall?

Or just apply single drywall on the existing wall?

One option takes more time and costs more to restore, the other takes less time and money.

What to do, has anyone done similar and noticed any difference!!

Regards

/ Samsung

 

[Mikael_L]

Hi, welcome to the forum.

Add an extra layer of plaster, and preferably fill the gap with sawdust, stone wool as a second option probably made a big difference. Unfortunately, I don't know if it's worth the extra work to open the wall...

Soundproofing is about:
1. Weight of the insulating material.
2. Removing resonances.
3. Avoiding cracks, gaps and pipes etc. that leak sound.

and a few other things.

So, what kind of sound needs to be insulated???

Not to be cheeky, but much of this has already been covered in old threads. Search and you shall find...
By searching for soundproof*, I got hundreds of hits, I'll attach a few here:

http://www.byggahus.se/forum/isolering/50934-ljudisolering-vid-nybygge.html
http://www.byggahus.se/forum/isolering/50973-ljudisolering-i-innervaegg.html
http://www.byggahus.se/forum/isolering/60361-ljudissolera-innervaegg.html
http://www.byggahus.se/forum/isolering/50090-effektiv-ljudisolering-i-hus.html
http://www.byggahus.se/forum/isolering/50079-isolera-vaegg-mellan-badrum-och-sovrum.html
http://www.byggahus.se/forum/isolering/50082-ljudisolering-i-radhus.html
http://www.byggahus.se/forum/isolering/50100-ljudisolera-tak-mellan-vaningar.html
http://www.byggahus.se/forum/isolering/51082-isolera-innervaegg.html
http://www.byggahus.se/forum/isolering/51100-isolering-av-mellanbjaelklag.html
http://www.byggahus.se/forum/isolering/51138-isolera-innervaeggar-eller-vad.html

ps. has mr Z changed his nickname to zankan???

 

[Samsung]

Hi Mikael,

Thank you for your response.

Has anyone on the forum done something similar, and noticed a difference in noise levels before and after?

Standard construction for inner walls in Älvsbyhus: 10mm chipboard + 70mm stud + 10mm chipboard.

Planned construction: 13mm plasterboard + 10mm chipboard + 70mm stud + 10mm chipboard, why I don’t have plasterboard on both sides, well! one side is already finished wet area.

Hope you understand my question

Best regards,

Samsung

 

[tallmilan]

There is insulation that is adapted to acoustics and not thermal insulation, specifically for interior walls.

 

[Samsung]

Hello Tallmilan,

Any more info about that type of insulation, where one can get it?

Would love input from anyone else who has tried different types of walls, with content, surface layers of different types... etc.

Best regards,

Samsung

 

[Mikael_L]

The only thing I can contribute from my own experience is that in the house we built when I was a teenager, half of the upstairs was finished at the beginning. It was insulated with fiberglass in the joists, and there were substantial problems with sound leakage between the upper and lower floors.

When the other part of the upstairs was to be fixed, this was pointed out to the craftsmen who then suggested filling with sawdust instead. And this turned out to dampen sound significantly better.
From what I have learned over the years, I believe it was primarily due to the much higher density of sawdust compared to fiberglass.

 

[greenbay]

One way could be to open a small gap between each standing rule. Then fill with newspaper rolled into balls, all the way up. After that, apply an extra layer of plaster on the outside.
This was used by an old forum veteran, KarlIIX, if I remember correctly. He built a log house with cellulose insulation, mostly ecologically friendly.
Haven't tried it myself.
Best regards,
greenbay

 

[tallmilan]

Check out isover.se the product is called isover piano

Henrik

 

[Samsung]

Hi Henrik,

I have checked their website,

I have found some useful information, see the link below.

Störande ljud

 

[tallmilan]

Don't forget that 3dB is half the sound.

.Henrik

 

[jakim]

Don't forget that 3dB is half the sound

.Henrik

I think it should be 10dB for a doubling/halving of sound intensity

 

[tallmilan]

Well, it depends on whether you're talking about the effect or the volume...
But you're absolutely right, since we're talking about sound level, it's 9-11db (SPL)

Henrik