Just realised that I was going to make a mistake... I think.
At the moment I have that - the studio space is empty as nothing is built yet. Behind the existing wall is a commercial space.
I was going to do this - which I just realised would create a 3 leaf wall - I think...
Now I came up with this solution - simply remove the plasterboard of the existing wall on the studio side, which removes one leaf, back to a two leaf wall
or this one: remove the plasterboard of the existing wall on the studio side, and add it to the two Fermacell boards, to beef up my leaf.
The question I want to run by the Knowledgable Ones here is, is solution 2 better than solution 1 for isolating (as I suspect due to increase in mass) or is it insignificant and useless waste of time and money? Thanks!
existing wall and 3 leaf issue, anyone?
Originally posted at johnlsayers.com, topic 13251.
That last option is EXACTLY how 2 leaf, with same mass, performs better than as 3 leaf. Remove the existing mass and add it on one of the leafs again.
If there's even an option to add extra mass on the wall of the commercial space then you're really secure :)
Ta for confirming that Ro, it was nagging me, much appreciated! Sadly I cannot alter the wall on the commercial side (already been decorated and so on), the only thing I could do would be to stick plasterboard between the steel frame, and I suspect that it's not ideal.
Just out of sheer curiousity though, would this solution below be better than solution 2 in previous post, or would it be the same as it's equal amount of mass?
In terms of mass; yes it's the same. In terms of resonance; this will work better.
Resonance will half when mass is doubled. A lower resonance is better (less auditable)
IF you have the option to do that (but It's gonna be tricky not to bother the neighbors), I'd say go for it.
Ro, the only way I could do that would be as below: to stick the plasterboard (I would have removed from their wall) to my side of their wall between the steel beams (walls done in placostil light steel beams and not 2x4) - would that be better than my solution 2?
you're gonna have a problem attaching that extra sheet of GB to the neighbors wall. And you should be very carefull. Dunno, it's tricky.
In this case I'd just go with extra mass on YOUR side of the wall. Seems like the only practical solution.
Yes, that will work very well. That's usually called "beefing up" the outer leaf here. Just caulk around the edges of the drywall that you install between the framing. - Stuart -Ro, the only way I could do that would be as below: to stick the plasterboard ... to my side of their wall between the steel beams