wood floors

Hi-

I am building a vocal booth in my apartment, on top of an existing wood finished floor that is not insulated and rather old.

I originally built a plywwood deck on top of 2X4 joists decoupled with u boats, but after reading Rod Gervais' book decided to dismantle the entire floor and just double up on the plywood.

Is this OK for recording and/or mixing? Wooden floors with bass traps in the corner and Auralex acoustic foam on some walls?

Thanks for any information.