soundproofing stud walls

[skhudy]

Hi,

I've got a 1920's terraced house.

I'm slowly renovating the house. Upstairs the rooms are separated by stud partitions.

Having done 2 rooms, taking off the plaster / laths and 12.5mm plasterboard on top, thin coat of bonding and skimming I've sure the sound still travels more than it used too between these rooms, as the walls are less dense I guess.

Too late for those but the last room I wanted to try to add something to deaden the sound, if only a little. I've read about staggered stud partitions, that's not really an option (in my next house it could be!). I've also seen the resilient bars you can use for fixing plasterboard too, for sound proofing - again a bit difficult to do as I've changed all the doors / door frames for the 4inch ones.

I was thinking of adding slab insulation, is there any advantage of doing this? And if so, does it specifically have to be the acoustic type, or are they all really more or less the same.

The stud depth is approx 75mm, if there is any advantage of the insulation, should it be the 75mm type or would 50mm suffice?

Or am I missing something else which I've missed which could help

 

[skhudy]

Actually thinking about the resilient bars, If I put them on, I could add an appropriate thickness timber around the door frame.. they are painted white so should be able to blend them in..

Still open to advise, and comments on the slab insulation, thanks!

 

[freddiemercurystwin]

Use this: http://www.knaufinsulation.co.uk/en...ls/earthwool-acoustic-roll.aspx#axzz32frYvD4z

Sound reducing insulation is a lot denser than ordinary mineral wool insulation, and will help to reduce sound transmission.

 

[skhudy]

Selco have the 50mm for £33 a roll... is putting 2 layers in a 75mm partition a no no?

 

[freddiemercurystwin]

You can do that, it will compress.