Double Wall construction Insulation Contact - Flanking?

I've read through forums here trying to pinpoint an example of this from the vast history of posts, but have not had any luck. I'm thinking that my humble basement single room thread isn't enough of a draw for much attention so I'm posting this as a separate matter in hopes of some attention. Details I have two 2x4 walls. 1.4'' of gap between the two. The exterior facing frame has R19 in it. This of course exceeds the depth of a 2x4 frame, so I've put in a small amount of lattuce work to keep it in and compressed slightly. I'm nearing the point where I can close up the frame with insulation and drywall. Q's - If I put R19 in the interior frame, will contact with the exterior frame's insulation be a contact point for vibration? Or is it worth the effort in putting lattuce work behind the interior wall to keep it from touching the other wall? Would I be best served with another type of insulation? (R19 was at little to no cost and leftover from other projects..) Should I just buy something like Roxul (fitting a 2x4 wall) as the best solution for the interior wall? Simple stuff and I'm just nearing the time that I'll work on it. Frantically doing research to see if this is an issue or not. I believe one of Rod's construction myths has to do with "Close is good Enough", so I constantly look and rethink portions of the construction. Any help is gladly appreciated. my thread - http://www.johnlsayers.com/phpBB2/viewtopic.php?t=8887&start=30

Bump Getting to the point where I'd like to put drywall on these double walls and I was hoping for confirmation or some advice in the matter. cheers!

Cram wrote:

If I put R19 in the interior frame, will contact with the exterior frame's insulation be a contact point for vibration?

Nope = as long as you don't compress this to a thick slab of material it will be just fine. Look at it this way - you have just about 5" from tthe face of stud wall to face of lattice holding the back insulation in place. That means only about 1/2 to 3/4" of compression on the insulation - it is still very fluffy. Rod

rod gervais wrote:

Cram wrote:

If I put R19 in the interior frame, will contact with the exterior frame's insulation be a contact point for vibration?

Nope = as long as you don't compress this to a thick slab of material it will be just fine. Look at it this way - you have just about 5" from tthe face of stud wall to face of lattice holding the back insulation in place. That means only about 1/2 to 3/4" of compression on the insulation - it is still very fluffy. Rod

Rod, thanks. It was something I suspected was ok to do, but as I said, I'm trying to make sure I do nothing in the "close is good enough" way of things.