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Sound insulation

  • 14-10-2012 5:04pm
    #1
    dos29
    Registered Users, Registered Users 2 Posts: 540 ✭✭✭


    Looking for some opinions.
    I'm at the stage where I'll soon be insulating between joists and studs.
    Main consideration is sound but isolating heat between rooms is a bonus and works towards the zoning.
    My plan at the moment for downstairs ceiling is-
    Skim, 2 x 12.5mm soundbloc slab, resi bars, 150mm rockwool, 18mm ply, 4mm acoustic rubber mat,
    18mm t+g OSB floating, and good underlay and carpet on top.
    Plan for studs is 2 x 12.5mm soundbloc slabs, 100mm rockwool, 2 x 12.5mm soundbloc.
    Two main questions at the moment are-
    1. Has anyone used the resi bars? Can ya get them in Ireland?
    2. Is rockwool the best option? What is the difference between the flexi slab and the rollbatt (apart from price)?
    Is it the flexi slabs being more rigid and suitable for this, and if so are the rolls still a viable option?
    All related comments, alternative options, opinions welcome.....


Comments

  • #2
    mfceiling
    Registered Users, Registered Users 2 Posts: 12,902 ✭✭✭✭mfceiling


    Resilient bar is easy enough to get but only in specialist metal framing companies - you won't get it in chadwicks or homebase.

    It's normally screwed to the studs and is run the opposite way, then the boards are screwed to that.


  • #3
    SC024
    Registered Users, Registered Users 2 Posts: 586 ✭✭✭SC024


    You can get the Resi bars through Heiton Buckleys/ Brooks etc etc They are specials so you need make sure your quantities are fairly accurate as they wojnt take them back if over ordered.

    It is a good system but I have only ever seen it used in commercial/industrial situations. I would be inclined to think its a little overkill in a domestic situation but to each their own :)


  • #4
    dos29
    Registered Users, Registered Users 2 Posts: 540 ✭✭✭dos29


    Thanks for the replies so far.
    Possibly overkill, but for the sake of a few hundred quid, I'd prefer to make the most of this one chance I have of getting the best result I can. Master bedroom directly over living room is the main priority, but I'd like to give each bedroom the best chance of not having to put up with noise from below, having been brought up in a house where you can hear everything on all sides of each room.
    Rough prices I'm seeing are about £5 per 3m length in the UK, so at 400 centres, I need about 80 of them, so £400/€500 approx. I'll check with suppliers mentioned, thanks.
    Anyone know anything on difference in Rockwool products? Is Rockwool the best material for this?


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