Great forum you got here, plenty of really useful stuff for my construction project. Problem is, that my setting is somewhat different from normal and I really don't want to mess this up. So, any ideas or tips would come in handy.
Ok, some details...
Here's the room from above:

So it's 10.49 ft x 14.78 ft (minus the black boxes), height of the room is 8.53 ft
North and east walls are concrete, room is in the basement so there is nothing behind them, just ground. Tricky thing is that there is another studio behind south wall and that (and the west wall w/ door) is lightweight build; wood studs, rockwool in between and fibreglass coated plywood on each side (2-leaf walls?).
The idea is to build a floating floor and then room inside on top of that. But I've been thinking is that the only way? Is it possible to save some $$$ and only build insulation to floor, and S & W walls?
Other thing is that if I just stick with the way I mentioned first (floating room), do I need to put something extra to S&W walls? Or how should I proceed with this? Pls, help me out and all your sins will be redeemed

Thanks already!
Cheers,
FC