Gipsum Ceiling

Discussion in 'Home Theater Projects' started by john.michael, Feb 23, 2005.

  1. john.michael

    john.michael Agent

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    I am building my new dedicated home theater and I will have to put a gypsum "false ceiling" about 3" below the real brick and concrete thing. I have two questions:

    1 - Will it reverberate? I am sort of worried that it will act like a drum.

    2 - In order to minimize sound leakage to the upstairs neighbor, should I put Sonex between the real ceiling and the gypsum (or over the gypsum it self)?

    Thanks for your inputs.

    JM
     
  2. Bryan Pape

    Bryan Pape Auditioning

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    To kill many birds with one stone....

    To help stop transmission requires mass and more mass. You don't have a lot of space to decouple anything so mass is your best friend.

    Stuff the space above the gypsum with fiberglass or rockwool and put up a DOUBLE layer of drywall. The extra mass and stiffness will help block sound leakage and will also help to keep it from resonating as much. It will always resonate to a certain extent, it's just a matter of how much and at what frequencies.
     
  3. john.michael

    john.michael Agent

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    Just plain rockwool? BTW, is it flamable?
     
  4. john.michael

    john.michael Agent

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    OK, just made some research and found out that it is not flamable. Thanks.
     
  5. john.michael

    john.michael Agent

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    Bryan,

    Just found a local (in Brazil) supplier of rockwool. Thank you very much for your input.

    JM
     
  6. Bryan Pape

    Bryan Pape Auditioning

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    Glad you found some. Hope it works out well for you.
     

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