Hi Glenn, thanks for your reply. It actually sort of makes sense to me... What I'm dealing with is my contractor. He's been to my house to 1.) price the job 2.) see the floor when we had removed the carpets 3.) seen the floor when we had removed the old hardwood flooring which was under the carpets. Now the night before he was to start work he stopped by with his humidity checker and said I had too much humidity in my basement to buy a new dehumidifierand too run it for a couple of days and he'd check again. He's coming back tonight to check again. Not once in his previous visits did he mention that there could be any concen. He is going to lay I believe 3/8" plywood over the old plank flooring. My house is approximately 60 years old... I do run a dehumidifier but I do not draw out huge amounts of water. I can perhaps empty the tray 2 times a week in the hot humid weather and other seasons it doesn't even run steady. I appreciate your information. Oh yes, this is not in the basement but on the main floor of my house.