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returnstackerror's picture
Last seen: 3 years 6 months ago
Joined: May 17 2007 - 8:32pm
air gap or not?


I have a dedicated listening room being built in my new house.

The outer walls are concrete block with pour concrete centers and the 4"x2" framing is not attached to the concrete wall. There is a 1" gap between each thus giving me a 5" catvity to stuff with mineral wool.

My question is: Should I use 4" deep mineral wool (therefore leaving a 1" air gap) or use say 2" mineral wool giving me a much larger air gap and maybe increasing absorbtion.

Any help apprecicated.



ethanwiner's picture
Last seen: Never ago
Joined: Sep 1 2005 - 2:26pm
Re: air gap or not?

I'd fill the entire cavity. Not packed very tightly, but just enough to fill the gap. If you get mineral wool or fiberglass 6 inches thick, that should be perfect for a 5-inch gap.


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