There is a living room with a wooden sub floor , cement floor underneath. Without the wood there wound be maybe a 6" inch drop . Right now there is carpeting on the rotten wood underneath. Some have said to rip up the rotten wood, and pour cement of terrazzo to even off the floor . Or just tile over the cement and accept the drop from the dinning room into the living room.
Any suggestions

I would have to say, for purely hygeinic reasons, and for safety, to rip up the wood floor and pour cement and start new.

Thank You

QUOTE=tickle;3420900]I would have to say, for purely hygeinic reasons, and for safety, to rip up the wood floor and pour cement and start new.[/QUOTE]

Considering all options, concrete sounds like the best. With wire mesh to resist cracking and a bond breaker between the old and new concrete. You may want to get a professional opinion based on the condition of the old slab, as you would be putting about 10,000 pounds (70 lbs/s.f.) of load onto the old slab (based on 6 inches of concrete for a 12 x 12 room).
Wood might be less expensive but the work likely needed to build a true plane on top of a varying old concrete slab might eat up any savings compared to concrete.
Sunken floors can become a real hurdle for older folks especially.

Other things to consider, type of heat. If radiators or baseboard, they would have to be relocated.

Any other door ways would also have to step down. This could be dangerous.

What caused to rot? If that problem is solved, then you can build a wood floor on sleepers.

Chuck

6" drop to a concrete floor from one room to the next sounds like an enclosed patio or porch? In Florida? Probably hard to solve dampness coming right up through the concrete.

Thanks. It would be a real job.