mineral wool

[orksnork]

now, when using mineral wool in your walls:
are you using something like 3"-4" mineral wool BOARD? such as this http://www.insulationworld.com/ProdImages/min_wool1.jpg

or something that's more loosely put together like r13 insulation?

 

[Innovations]

You are looking for a semi-rigid board with about a 3-5 pounds per cubic foot density if you are building bass traps. If you are putting it INSIDE the wall to cushion the air space you want the fluffy stuff.

 

[orksnork]

and that answers that
thanks sir

 

[knightfly]

Agreed; but get thick enough "fluffy stuff" to slightly compress when the first panel is put on, and watch where you put your vapor barriers (like the Kraft paper or foil that's on most fiberglass insulation) - any questions, check here

http://www.johnlsayers.com/phpBB2/viewtopic.php?t=6066&start=75

I'll check in on your other thread (just noticed it when finding the above link) in a day or two... Steve

 

[bpape]

Exactly. For instance, an R-19 (5.5") compressed into a standard 3.5" cavity (2x4 walls) will give you damping, cavity resonance control, and keep the cost reasonable.

Bryan