John Sayers' Recording Studio Design Forum

Since you have a direct flanking path from your overhead joists that essentially attaches the framed walls, the RC might help overcome the flanking loss.

The windows, even if every wall and ceiling assembly had RC on it, will still be governed by the flanking that exists from the two frames.

The only way to overcome that would be to have as thick a glass, laminated pane as possible.

Ideally, you would change the framing to have it decoupled from the overhead floor joists, since you are not that far into this, that would be my option of the day, this is what I would do, is what I am saying.

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Brien Holcombe
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Sound: You can't stop it, you can only try to contain it.

Thanks Brien! (even though that isn't what I wanted to hear) That is what I'll have to do.

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"It don't get no better than this"