Existing Interior Wall Soundproofing

[Ulf1]

Hello, we have some interior walls that have gypsum/OSB but no insulation in the middle. Do you have any experience with whether the noise decreases if they are filled with loose fill? What type of loose fill is best for soundproofing?

 

[Jonatan79]

Best is stone wool/glass wool

 

[Aunty]

Best is Stone/glass wool

much better to apply one or two layers of plasterboard on the wall instead of insulating.
This solution is very simple as well.

otherwise, there are plenty of alternative solutions to work with that function differently well, such as pleated curtains, sound absorbers, etc.

 

[Ulf1]

much better to add one or two layers of drywall to the wall instead of insulating.
This solution is very simple as well.

otherwise there are plenty of alternative solutions to work with that work differently well like pleated curtains, sound absorbers

etc.

Unfortunately, there is no room for more drywall on either side. On one side there's a thermal storage tank in the way, and on the other side a door. I want to get rid of the speaker box effect on something..

 

[tergo]

Piano Sound Panel ISOVER C450 45mm 11.5m² - K-Rauta

 

[Ulf1]

Piano Ljudskiva ISOVER C450 45mm 11.5m² - K-Rauta

Hello
How do you get the boards into a finished wall?

 

[Aunty]

Hi
How do you get the boards into a finished wall?

You don't.
But blowing is also not very simple, you will need to make many holes in the wall that need to be repaired later, and you will definitely have to repaint the entire wall.

Are you saying it's not possible to mount extra gypsum on one side?
How do you mean a door is in the way?

 

[Ulf1]

you can't do that.
but blowing is also not so simple, you'll have to make a lot of holes in the wall that need to be repaired, and then you'll definitely have to repaint the whole wall.

Are you saying that it's not possible to mount extra drywall on one side?
How do you mean a door is in the way?

Gypsum is not an option. It seems like cellulose has good sound properties. And making holes in the walls' upper parts in several places is not a big problem. Patch and cover with moldings afterward.