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  • Thanks - hole in the wall it is .
    I didn't intend to remove the existing board and replace with sound proofing board but put the sound proofing board over the top.
    I just need to know where the thinest/weakest points are.

  • There’s every chance it’s already acoustic board. Buildings regs defo required it in 2005 when I dicked about converting an old house to flats.

  • Well I'll find out if it is acoustic board when I cut a hole but even if it is it doesn't work very well .

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