I am re-doing a room in my basement. I have just finished getting the walls insulated, and before I finish them I want to replace the floor cover. Presently there is carpet glued to the concrete! I have had no water problems in the 4 years that I have lived in this house, but I was thinking that rather then just putting new carpet over the concrete, I might put in a sub floor....What is the best approach to this??? I am new at this home reno stuff, but eager to learn, and want the best results!