Are floating walls necessary on separate slabs?

Situation: Med-large facility, rural - no noise issues, music recording Control room will be around 400 sq' and around 5000 cu'. I have a couple of .skp shots posted at: http://www.johnlsayers.com/phpBB2/viewtopic.php?t=8743 I'm building from the ground up and pouring separate slabs for each room. I am also using double wall construction for each room, so I should have truly unconnected spaces. With that in mind, is it still necessary to isolate the walls from the slab (rubber footings, foam rods, etc...)? Would there be a benefit to NOT isolating and having a more rigid structure? Also, I am planning to use a sand-filled raised floor in the control room, but not a "floating" floor. In other words, the floor will be raised, but will not bear the weight of the room. The weight of the walls will be directly on the slab. Comments? This is an incredible forum and I thank you all for your help!

Yeah, I would think you'd be fine with that -- separate slabs and separate frames, no attempt to actually float anything. The exception would be if you had impact noise close by, such as rumbling 18-wheeler trucks or trains. --Keith :mrgreen:

Thanks, Keith I realized after the post that I will have some connection through door jambs and window frames. Maybe I should float the frames? Tom

That's only true if you intend to literally share one window on both leaves. If you're going to do that, then it can be argued that you shouldn't even bother trying to do separate frames, because you've got a huge hole in your inner leaf. :roll: Keep studying. :-) --Keith :mrgreen:

No, they will be dual glazed. Or should I consider two isolated single-glazed windows? I would think that would open the door to inner panes getting dirty. Thanks Tom

s2dorat wrote:

No, they will be dual glazed. Or should I consider two isolated single-glazed windows? I would think that would open the door to inner panes getting dirty. Thanks Tom

Tom, they should be 2 seperate window assemblies - one in one wall and one in the other......... Rod

Absolutely: one single glazed window in each leaf, laminated glass, glass at least 1/3 the total thickness of the drywall. Make the inner glass removable for occasional cleaning. There are threads here that illustrate this. :-) --Keith :mrgreen: