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In Reply to: Dedicated HT room advice needed... posted by ChrisVH on July 9, 2006 at 20:27:31:
I don't think what you're proposing would work with a single layer of drywall. Instead of getting the effect you intended, you'll end up with the opposite effect - you'll decouple the drywall from the studs just enough to make the drywall act as a giant 70hz drumhead.
Follow Ups:
The silicone bead would be between the homasote and studs. Another layer of drywall would be attached to the homasote...
Ah, I see.Homasote strongly recommends using a panel adhesive between the Homasote and the studs. That's what I'd do if I were you - cured silicone caulk is not adhesive of course.
I don't know how far down the path you are into this room, but if you have a choice at this point, I'd suggest that instead of drywall over Homasote, you go with a double-layer drywall sandwich with damping material (such as Green Glue or similar) as the filler. Using this approach, you can better contain bass energy in the room, and get the sound transmission reduction you're looking for.
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