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  • FIRST POST
    • soundman111
    • By soundman111 20th Mar 17, 8:52 PM
    • 5Posts
    • 0Thanks
    soundman111
    Soundproofing DIY Project
    • #1
    • 20th Mar 17, 8:52 PM
    Soundproofing DIY Project 20th Mar 17 at 8:52 PM
    Hello Folks,

    I am beginning my insulation against my noisy neighbors, i feel happier that i am doing something about the noise. I have spoke to them many times, but some people are just unreasonable.

    I am insulating the loft to begin with, this includes mineral wool acoustic insulation, this is lightweight and will go directly onto the floor of the loft. The loft floor is very weak and is just plasterboard, like most lofts if you was to stand on the floor you would come through the ceiling.

    I am also going to install a 5kg barrier mat and some acoustic slabs to stop alot of noise that enters our home through the loft. My only concern is should i lay the acoustic slabs and 5kg barrier mat across the beams and joists of the loft or onto the loft floor directly? I just do not want the ceiling cracking, although these materials are not that heavy i just wondered what would be the best way of installing this?

    The mineral wool is very lightweight so this is fine directly onto the floor, do you think as a precaution put the barrier mat and acoustic slabs over the beams of the loft? 5kg is not that heavy and i just wondered on your thoughts please?

    Thanks for all your help folks. Many thanks in advance.

    Paul
Page 1
    • Grenage
    • By Grenage 20th Mar 17, 9:57 PM
    • 1,024 Posts
    • 961 Thanks
    Grenage
    • #2
    • 20th Mar 17, 9:57 PM
    • #2
    • 20th Mar 17, 9:57 PM
    Lightweight mineral wool will do nothing for sound insulation; you'll want high density bats which will fit snugly between joists.

    Don't expect miracles, though, retrospectively soundproofing is tricky at the best of times.
    • Norman Castle
    • By Norman Castle 21st Mar 17, 9:40 AM
    • 5,708 Posts
    • 4,459 Thanks
    Norman Castle
    • #3
    • 21st Mar 17, 9:40 AM
    • #3
    • 21st Mar 17, 9:40 AM
    Is your loft open to the neighbours loft? Most have a wall between them. If there is a wall but with gaps try blocking the gaps.

    • zoothornrollo
    • By zoothornrollo 21st Mar 17, 9:50 AM
    • 182 Posts
    • 19 Thanks
    zoothornrollo
    • #4
    • 21st Mar 17, 9:50 AM
    • #4
    • 21st Mar 17, 9:50 AM
    sorry if I'm misunderstanding the set-up, but don't understand why insulating your loft floor will help with neighbour noise ... isn't it the party wall you need to think about?
    • jimi_man
    • By jimi_man 24th Mar 17, 10:20 AM
    • 103 Posts
    • 84 Thanks
    jimi_man
    • #5
    • 24th Mar 17, 10:20 AM
    • #5
    • 24th Mar 17, 10:20 AM
    As someone said above, retrospective sound insulation is difficult. A lot depends on what you are trying to prevent. Do your neighbours have live bands play next to you or do they just have noisy kids, the hi-fi is turned up, loads of parties etc etc?

    With sound, generalising massively, it's split into high frequency and low frequency. High freq is relatively easy to block being highly directional. However low frequency is, by and large, omni directional and very difficult to stop. Most efforts of sound insulation tend to work on the highs, but have no effect on the lows and usually result in a muffled thud, thud thud sound as the low frequencies 'leak' through the joints, joists, or any connecting path, which is why the room within a room principle is the way to go to avoid this, though this is clearly impractical for a house.

    It's also worth remembering that the other key is density. In your case mineral wool will have little effect (other than maybe helping your heating bills). You need isolation (a rubber mat across the whole of the area) and density (a couple of staggered layers of thick plasterboard sheets as an example) . But as well as the loft you'll need to think about the walls (the low freqs will leak through them) and the floor (and them), windows (ditto) and doors (ditto) and then you quickly realise it's like trying to plug holes in a colander.

    Not trying to put you off, but it's a lot of work and expense, without any guarantee of it working and sometimes it's cheaper, easier and more effective to work with neighbours in mediation to resolve the issues. If you do go ahead with it then you'll need to be realistic about what result you'll achieve.

    Good luck.
    • folkestonelisa
    • By folkestonelisa 24th Mar 17, 7:59 PM
    • 479 Posts
    • 366 Thanks
    folkestonelisa
    • #6
    • 24th Mar 17, 7:59 PM
    • #6
    • 24th Mar 17, 7:59 PM
    Jimi_man we can hear our neighbours telly and talking in our living room and bedrooms on one side of the house. End terrace. We were planning on getting a company in to soundproof it, are you saying that we wouldn't achieve much by doing this?
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