We would like to expand our kitchen into a family room, but the floors are not even, nor are they of the same material. We want to remove part of the wall between the rooms and install tile in both. The wall is not load-bearing, so that is not a problem. The floor in the family room is concrete with carpet, and is sunk 1-1/2" below the kitchen, which is vinyl over a crawl space. The house was built in the 1920s.
What would be the best way to raise the concrete floor? I have thought about concrete overlay, or using pressure-treated furring strips and tongue-and-groove sub-floor.
The family room was originally the back porch of the house, which was enclosed quite a while ago.