Raising step down living room questions
I'm looking to raising the floor of our living room to be level w/ the rest of the house. This level of the house is on slab and the living room is 5.5" lower than the rest of the floor (the room is approx 18'x20'). I understand that I have two options: 1) frame in a new floor or 2) pour concrete.
For a DIY, it seems like framing it would be the solution. Okay here is what I'm thinking:
1) remove old carpet and tack strips
2) lay down vapor barrier over existing concrete slab
3) Rip (pressure-treated) 2x6 down to height so that + new subfloor is level w/ the higher floor we're trying to match
4) Install ripped 2x6 16" on center, but I don't understand how or if necessarily these boards will attach to the existing concrete slab?
5)Install some type of insulation between the joists (thinking this will help reduce any sound differences when walking and transitions to the concrete subfloor, any problems w/ this idea?)
6) Install (nail or screw?) sub floor on top of new joists
I'd like to know anyone's thoughts on this method vs concrete and also if you can help address specifically how I will attach the new floor joists to the concrete subfloor.
Thanks for any help or suggestions,