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Insulating a partition wall

Can anyone please suggest a decent, but cheap, way to insulate partition walls? It isnt for thermal reasons but more for acoustics.

Comments

  • phil24_7
    phil24_7 Posts: 1,535 Forumite
    Eighth Anniversary 1,000 Posts Combo Breaker
    Just to be sure, are you talking about an internal wall between 2 rooms, and do you have access to both rooms?
  • HaydenB
    HaydenB Posts: 160 Forumite
    Tenth Anniversary 100 Posts Combo Breaker
    Yes and yes. 3x2" timber, plasterboarded and skimmed (once insulated).
  • Grenage
    Grenage Posts: 3,214 Forumite
    Part of the Furniture 1,000 Posts Name Dropper
    Fill it with as much rockwool as you can; the denser the better. You can get fibreglass batts, which would be ideal.
  • phil24_7
    phil24_7 Posts: 1,535 Forumite
    Eighth Anniversary 1,000 Posts Combo Breaker
    When I did 2 of my bedrooms I used high density rockwool type stuff in between the studs. I cut so that they fit snuggly between the studs and left an equal gap at either side. It wasn't cheap and I got it from Wickes (can probably get it much cheaper from a builders merchants or somewhere like Encon).

    I then double boarded, firstly with soundboard which had all the joins and right around the edge sealed with acoustic sealant (available in big tubes along with a special gun, from toolstation), then with a regular layer of plasterboard.

    This worked out to be a similar thickness to the original lath and plaster so meant architraves all lined up. It is many times quieter than a regular stud wall and noticeably quieter than a lath and plaster wall. It made it very difficult to hear my baby in the next room so we had/have to keep the bedroom door open!

    Regards
    Phil
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