Reducing sound through party wall in loft conversion?

[Ian H]

We are doing a loft conversion and our neighbors already have one.

Their side is a kids playroom and my side will be my bedroom.

Is there anything I can do on my side to reduce noise? I know PIR boards are no good for noise so thought maybe batton, pack it with something then board it with blue boards?

Any tips or advice? Thanks.

 

[HERTS P&D]

Are you afraid that the kids will be complaining about the noise coming from your bedroom?



Andy

 

[Ian H]

I don't know what you mean

I'm thinking of when I'm having a lie-in on a weekend!!

 

[endecotp]

How much thickness can you manage? Rather than battens fixed to the party wall, fit studs with a small gap behind. (Of course these have to fix to the rafters and joists, so there is potential for noise transmission there.) Then fill between the studs with acoustic mineral wool or similar, and board with blue boards. Or if that's too thick, fit battens then resilient bars then plasterboard, with wool behind.

Detailing at floor and ceiling level is important.

 

[Notch7]

Isolation and mass!

So, as above leave gap to party wall, form stud wall, ideally fill with acoustic grade rockwall, then double board with plasterboard -acoustic plasterboard.

Or spend 0.14p on these :

http://www.thesafetysupplycompany.c...K-14FIgDdCla_xKrxBUMw9AhRVxp5mkhoCyU8QAvD_BwE

 

[Ian H]

How much thickness can you manage?

I could probably loose upto 150mm, it's an awkward space above and below a chimney breast, we want the breast left exposed but it's plenty deep at about 400mm.

 

[HERTS P&D]

Breast exposed?..................................I total agree!

Andy

 

[Doggit]

Ear plugs fall out. Noise cancelling earphones work well. I don't think you're allowed to shoot kids nowadays, but things may be different up were you are.

 

[Ian H]

So if I built a stud wall, separate from the party wall, would the resilient bars add to it or not really?

I just looked on Rightmove and the neighbours chimney breast if fully covered, no alcoves, you can even tell there is one.

 

[Doggit]

Just how much noise comes through though.

 

[endecotp]

So if I built a stud wall, separate from the party wall, would the resilient bars add to it or not really?

Separate studs plus resilient bars is probably overkill.

There are aome good websites about soundproofing, e.g. https://www.soundstop.co.uk/soundproofing_walls.php

Edit: look at the table comparing different constructions part way down this page:
https://www.soundstop.co.uk/soundproofing/soundproofing-walls/Genieclip-wall-solution2.php

 

[Ian H]

I think I'll go for the independent stud wall with double blue boards over it.

The wall is untouched at the minute and the neighbours are new so I'm not sure how much noise there will be.

I can't imagine there being loads but the BCO was happy for us to build something to insulate sound rather than heat as the drawings show.

 

[Doggit]

Why not put Rockwool batts in between the studs as well.

 

[Ian H]

Yes, will do

 

[^woody^]

I'd be inclined not to have an air cavity as you can't guarantee that sound is not going to creep into it from around the apex or eaves.

Rockwool batts up against the wall will prevent sound from the wall and around it (as long as you seal around the gable properly), and then your timber stud wall with more rockwool. I don't see the value of single or double acoustic plasterboard as that is not for stopping sound getting out.