I am building a woodworking shop underneath my patio. Unfortunately it shares two walls with the suite that I rent out. The existing walls of my house are 2x6 construction and from the outside in are hardy plank, insulation, then drywall.
I understand that a triple leaf can cause a resonance effect that can potentially make things worse and I understand that a double leaf is the better approach. However, removing the hardy plank from my house is not an option. So would building a false wall out of 2x4 and filling it with insulation (thereby creating a triple leaf) still be better than just sticking with the double leaf that is in place?
Would it make a difference if I stuffed the cavity full of insulation to eliminate the narrow air gap?
Thanks in advance for your help