false walls

ok, say you've got some false walls, spaced about 6" out from the control room's inner leave, packed with 703 covered with fabric. What holds the insulation in place? I mean, other than fabric, what's preventing the insulation from being "pushed in"? Some sort of backing? My first thought was to build the wall with plywood on one side (the side facing the inner leave), but I'm not sure if that would being adding a 3rd leave. What do you recommend? Also, from what I've seen the recommended material for building falsies is wood studs... are metal studs acceptable? Thanks.

Hi d trax, If you have your inner wall built already and you're just building an "acoustical treatment wall" or a "falsie" :) those would usually be slat resonator walls. Insulation is tucked tightly between the studs and slats attached over it so the insualtion can't be pushed away nor touched. And if you're just building an absorber with just insulation between the studs, i gues you'd just have to be carefull not to lean onto those "falsies" too hard.Insulation shouldn't fall out if tucked tightly between studs. If your studs are @ let's say 16" centres cut the insulation to 17" width and stick it in there. You could put some sort of "light cross bracing" on the back of the stud frame just to keep the insul. from falling backwards. But I guess if someone's gonna fall onto your cloth wall, the insul. falling out will be the least of your problem :wink: oh yeah...i think the steel studs would be acceptable..

My plan for this was to build the wall, then put something on the back of the wall over all the stud spaces except one. I don't know if I'd use fabric, but visqueen (like a vapor barrier) might work. Don't use plywood, but perhaps you could use pegboard. That'll let the low freq's thru without letting the insulation fall. But yeah, don't leave it unsupported. First drummer to lean against your wall will fall right thru it.