Got some pictures?
Cut the subflooring between the floor joist, and pry it out with a pry bar.
I use one of these to speed things up.
http://www.thegutster.com/
I'd be looking at what's under that floor once it's torn out to see if they used a vaper barrier and or any foam insulation under the floor.
For A subfloor I'd be using 3/4 T X G Advantec subflooring with constrution adhesive on top of the joist and 8D ring shank nails following the nailing patten right on the panels.
Cut the subflooring between the floor joist, and pry it out with a pry bar.
I use one of these to speed things up.
http://www.thegutster.com/
I'd be looking at what's under that floor once it's torn out to see if they used a vaper barrier and or any foam insulation under the floor.
For A subfloor I'd be using 3/4 T X G Advantec subflooring with constrution adhesive on top of the joist and 8D ring shank nails following the nailing patten right on the panels.