nealtw

What you have is slab on grade. In the front the footing is as deep as required to below the deepest frost for your area and the back the foot is at least below the floor by 8". After that work was done the foundation was filled with sand or some other fill. As the whole foundation is below the living space it is not waterproofed and you should have drainage around at or below floor level. If you have a hill behind you, there is nothing stoping water from traveling under the footing and getting into the fill under the floor. Water will wick thru concrete from cold to warm and you have a wet floor. I don't think wood of any kind should be tried here now that you know there is a problem with water.

pstew96

I guess I will have to see what happens, if the floor gets to bad the tenant will have to be inconvenienced while I get it tiled, or the tenant could live with it until he moves out at which time I will tile it. Hopefully it will not get any worse! Thanks for your input!