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Discussion Starter · #1 ·
Our room addition shares a wall with the current exterior wall of our house. Would putting plywood on that wall help with reducing sound transmission?

Can't afford to do double wall contruction.
 

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Hmmm...I'd think that plywood would be:


1. more expensive than framing a second wall and drywalling it (2x4's are cheap, and gyp board is like $4.50 for a 4'x8' 1/2" sheet vs $10-$20 for a plywood sheet)


2. very reflective. You'd probably get better results investigating some of the sound deadening products, but honestly I don't know how well it will reduce transmission...there are a lot of factors at play here and retrofitting an existing wall generally doesn't yield great results.


Just my $.03 (inflation :p)


Cheers,


Rich
 

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I built a false wall , that way you have access to everything, in addition, the false wall (drywall) reduces most/all transmissions from the back wall. This can be good and bad..since I now notice slight directionality of my subs.


Are you in Las Vegas? You can swing by my place if so and see what i did
 

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Discussion Starter · #4 ·
Really don't have room for a double wall. I'm real close on legal set backs & trying to get as much interior space as possible.
 

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A double layer of drywall ( 5/8 and 1/2 ) will give you a higher stc and is easier and less $$


Glue and screw.
 

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You really don't need a double wall. A staggered stud wall will do the trick and only adds 2" to the thickness. This is what I will be doing with my limited space. Double drywall is cheaper and better for sound than plywood, or better yet, sound board, which is pretty cheap too.
 
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