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seanfeb2021

Soundproof 1st floor joists - stud wall issue

seanfeb2021
3 years ago
last modified: 3 years ago

Hi all, I'm looking for advice to soundproof a 1st floor bedroom. I want to address sound coming from the living room below and also impact sounds from walking on the floor. Im considering adding mineral wool, a layer of wallboard between the joists before putting down a new subfloor and carpet. I was also considering accoustic floor mounts upside down on the joists to help with impact noises https://bit.ly/3pLcR97. I want to know has anyone any suggestions? The main issue I have is that a stud partition between bedrooms is situated between 2 joists and supported by the existing floorboards. Should I add support blocking between the joist to support the stud wall? See photos below. Thanks.
https://ibb.co/YL8thvs
https://ibb.co/RTSJDgf
https://ibb.co/mDxmgmD

Comment (1)

  • cannonja
    3 years ago

    Cannot see any pictures, but I use acoustic tape for top of joists,
    Remove dust, dirt etc from joists and just tape on
    Easy
    I use 18mm subfloor, exterior grade ply, with spacing between boards of 2mm, to allow for shrinkage and expansion, mastic joints
    Screw down with floor Tite screws, job done

    Also recommend 100mm stonewool slabs between joists for ceilings, and stud walls

    You could also fit a suitable flooring, cork floor or similar, deep pile carpet is also excellent

    Note , sizing and spacing of joists critical

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