Author Topic: Is a triple leaf better than nothing?  (Read 3257 times)


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Is a triple leaf better than nothing?
« on: August 09, 2012, 12:04:38 AM »
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

Randy S

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Re: Is a triple leaf better than nothing?
« Reply #1 on: August 09, 2012, 03:17:14 PM »
when we get into situations such as this which we can not avoid the triple leaf we will treat the center leaf first. Use the SSP foam mat 1/4" on the existing wall before building the new frame.

Make sure the frame is at least 1/2" or more off the existing wall fill the cavity with cotton fiber insulation and attach Mass loaded vinyl barrier to the new frame followed by drywall.

Randy Sieg

Super Soundproofing Co
Ph. 760-752-3030