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      07-17-2023, 09:26 AM   #14
F32Fleet
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Drives: 2015 435i
Join Date: May 2005
Location: Southeastern US

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Roxul safe n sound. You want an air gap inside the wall cavity so that sound will have a harder time moving through the wall.

Roxul Safe n Sound is mineral wool batting and sold in a thickness which will leave an air gap.
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