Floor is a concrete slab. I am intending on putting in a floating wood floor.
Before you seriously think about floating a wood floor, I would read up on it. This isn't a slam bam thank you mam proposition
There are many things to consider, such as cracking the existing slab./weight vs isolator compression calcs/ AND the fact that raising a WOOD floor simply creates a drum head like diaphram, which even with isolation pads, needs dampening etc.
Besides, unless you are floating a WHOLE room, just isolating the floor may be an exercise in futility if the walls/ceiling/roof/doors create any weak links, which would negate your floor anyway. Not only that, when you get into this realm, PERMITS are almost mandatory if you want to keep your insurance intact. Another area of concern is ventilation, as an "soundproof" envelope is also "airproof".
The whole rooms TRANSMISSION LOSS needs to be addressed on an assembly to assembly basis/ including the roof, if its to to be part of the ceiling TWO LEAF-MASS AIR MASS construction. So does the exterior wall leaf(mass), as well as the existing interior drywall leaf. Unless this leaf is removed and a new leaf decoupled, even adding another layer of drywall will only offer 3-4db improvement in transmission loss as theoretically, doubling the mass of the COMPLETE WALL will only improve it a maximum of 6db TL.
If drums put out 110db at 1 ft, well, I think you get my drift
To get an idea of what building TRUE isolation assemblies are about, read this.
http://www.johnlsayers.com/phpBB2/viewtopic.php?t=2921&sid=8d0321cd1ab8af49d88b07a0ae73e101
or this. They pretty much cover things.
http://www.johnlsayers.com/phpBB2/viewtopic.php?t=839&sid=8d0321cd1ab8af49d88b07a0ae73e101
Of course, if you want to get REALLY anal, check this out. Talk about isolation.
http://forum.studiotips.com/viewtopic.php?t=107
fitZ