There isn't concrete under the rug but wood. Is the wood the carpet is tacked to covering the concrete?"

Lift a piece of wood and see, but I doubt there is concrete under it.

If it is a newer style condominum then yes, concrete, but not wood on top of concrete.

Tick

Thank You. It's a 15 yr old home in Texas. I replaced a toilet a few months ago and saw concrete so I assumed concrete was under the carpet. The wood is pretty thick and flaked when I tried to pry, so before I caused more damage I wanted advice.

If your house is on a slab, no basement, then u probably have concrete under wood. The wood was used to keep down the transmission of cold from concrete. If u wood is flaking, u may have a moisture problem.

Is the tub sitting on the wood? If so u will have problem wood as tub will be too high or want to down.

Chuck

If your house is on a slab, no basement, then u probably have concrete under wood. The wood was used to keep down the transmission of cold from concrete. If u wood is flaking, u may have a moisture problem.

Is the tub sitting on the wood? If so u will have problem wood as tub will be too high or want to down.

Chuck
Chuck, OP states it is a second floor bathroom. Concrete on second floor??

Tick

My wrong. Did not read header. Sorry

Chuck

You might be looking at some floor leveler, it can look like concrate or there may have been a wet bed base and tile originally. In a house this age, never can tell what's happened over the years.