I have to upgrade the sound/fire separation on a floor/ceiling assembly (between two apartments that are becoming condos – this is a permit requirement and I have no choice!). I have two ways of doing it, and I’m wondering which recommend. The existing ceiling is 1/2′ sheetrock on resilent channels. I can either add another layer of 1/2″ sheetrock, or remove the existing sheetrock and replace with 5/8″ Type X. I’m guessing that the addition will be better/easier/cheaper, but am I missing something here?
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Replies
I'd agree with you that the easiest thing to do is just add a layer. No demo, no fuss no muss. Except that you may want to check with your local code officials(you may already have done this).
What I mean is you can't create your own "rated" assembly by ...."lets just add another layer of type "X".
I did check with the local building department, and in fact they gave me the choice of either new 5/8" type X or a 2nd layer of 1/2". Thanks for your input!
I'd definately add another layer of 1/2". More mass will equal more sound deadening. If you add you end up with 1" thick sheetrock instead of 5/8". A 38% increase in mass. So, it's not only easier, quicker, & cheaper, it should do a better job.
Can't see where you're missing anything.