ZELMA wrote:Concerning noise, the reason drywall wouldn't block it as well as shotcrete is vibration. Thicker drywall doesn't vibrate as easily.
The first principle of sound isolation is mass. Mass impedes the transmission of sound in a simple way - it’s harder for the sound to shake a very heavy thing than a very light thing, no different than saying it’s harder to push a shopping cart full of lead bricks than an empty cart. However, to make large changes in performance you have to make very large changes in mass. In theory doubling the mass of a panel without an air cavity will improve things by 6dB. Typically, on the common single wood stud wall, doubling the number of drywall layers yields 4-5dB of improvement.
ZELMA wrote:Maybe some extra blocking (horizontal 2x4s) would help.
ZELMA wrote:Maybe a few extra screws while hanging the drywall?
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