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concrete floors v. sound proofing floors

  • 31-01-2009 12:04pm
    #1
    TAPAD
    Closed Accounts Posts: 1 ✭


    hi there,
    I am currently at the planning stage of my house. it is a storey and a half design.
    I had intentions of doing a concrete floor on the first level however after speaking to our engineer, he advised that sound proofing the first floor may be more suitable, as the walls will need to be bulked up to support the weight of the concrete.
    I know that sound proofing the floor will be easier when it comes to the plumbing of the house etc.
    However i am hesitant, does the soundproofing really work and what is the price compared to that of the concrete floor?

    If anyone knows anything on this matter it would be greatly appreciated!
    Please and Thanks.


Comments

  • #2
    Heatherview
    Closed Accounts Posts: 152 ✭✭Heatherview


    Hi Tapad
    There is a product called Rocksilk accoustic fllor slab. Go to the address below and into accoustic.This product is used on floor base first then continue with your insulations/pipe work etc

    www.insulationdistributors.ie

    Heatherview


  • #3
    RKQ
    Registered Users, Registered Users 2 Posts: 2,292 ✭✭✭RKQ


    Concrete hollowcore slabs would be more expensive. Ground floor wall thickness / width also need to be increased and its advisable to use steel I beams for ground floor window lintels & internal door lintels.

    Timber floors can be soundproofed. It depends on the level of sound proofing required. The deeper the floor construction the better.

    Have a look at e-cousti pdf for details. 19mm plaster slab and double slabbing ceilings greatly improves sound proofing.


  • #4
    bryston
    Closed Accounts Posts: 33 ✭bryston


    You can get timber joists to perform reasonably well compared to concrete. In terms of impact noise (i.e. footfall), joist floors will always have a certain low-freq "thump" noise coming thru to below because of the greater deflection of a joist compared to concrete.

    In terms of airborne sound (i.e. TV's, hifi), you really need to isolate the ceiling layer from the bottom of the joists using Gypframe RB1 Resilient Bar.

    http://www.british-gypsum.com/pdf/TI-032-02%20Resilient%20Bar.pdf

    You attach 1 layer 19mm gyproc Plank and 1 layer 12.5mm Soundbloc under the RB1 bars. Then on tope of the joists, install 19mm Gyproc Plank and 18mm Playwood.

    I did this in my new extension and have achieved sound insulation of 53dB (I've measured it). This compares with 38-40dB for a normal joist floor.


  • #5
    morning delight
    Registered Users Posts: 154 ✭✭morning delight


    bryston wrote: »
    I did this in my new extension and have achieved sound insulation of 53dB (I've measured it). This compares with 38-40dB for a normal joist floor.

    What level of sound insulation does a hollowcore concrete floor achieve in comparision?


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