ᐅ Timber Frame Construction – Creating Sound Insulation Between Rooms

Hello everyone,

We are currently having a single-family house built using timber frame construction. Right now, I am wondering if the interior walls will be sufficient to prevent hearing everything that is being said in the adjacent room.

The interior walls are constructed as follows: 10 mm (0.4 inches) gypsum board, 15 mm (0.6 inches) OSB, 12 cm (5 inches) timber stud, 15 mm (0.6 inches) OSB, 10 mm (0.4 inches) gypsum board.

My question is how I can improve the sound insulation of the interior walls.

I was thinking about adding an additional 10 mm (0.4 inches) gypsum board, effectively doubling the OSB with gypsum board on one side.

Alternatively (or additionally), cellulose insulation could be installed within the timber stud cavity.

The problem is that both sides of the walls are already covered with OSB, so for example, I cannot install mineral wool anymore.

Does anyone have any ideas or suggestions?

Do I understand correctly that you haven’t submitted anything and the walls are hollow???

Bookstar schrieb:

Do I understand correctly that you didn’t submit anything and the walls are hollow???

Yes, the walls, meaning the wooden studs, are hollow. This naturally applies only to the interior walls. The exterior walls are insulated with cellulose.

gipsi123 schrieb:

Yes, the walls, meaning the wooden studs, are hollow. This of course applies only to the interior walls. The exterior walls are insulated with cellulose.

Yes, I understand, but that’s not correct. Interior walls should also be filled with insulation, for example hemp.

Bookstar schrieb:

Yes, of course, but that is not correct. Interior walls also need to be stuffed with insulation materials like hemp, for example.

Yes, I figured as much. However, no house built by this construction company has insulation in the interior walls. So, are you definitely recommending using insulation there? Would it actually help with soundproofing?

Without insulation, the wall basically acts as a great soundboard. In my opinion, the interior should be filled with something like mineral wool.

If the company always builds without insulation, they should quickly provide you with a reference to show or let you hear.