Answer
Nov 03, 2024 - 10:34 AM
It is recommended for noise reduction but is not required. Page 7 and 8 of the installation instructions goes into more detail.https://www.greenbuildingsupply.com/core/media/media.nl?id=2623547&c=772072&h=a
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QJT9G72Itkbf-w_Cjs4LcJk6JuiHn2FwX251nK59dkLPSyi&_xt=.pdf
