The basement is your typical 1940 cement low ceiling type. It fortunate because the floor supports run horizontal with the stairs so there are no low beams to have to cover aside from the bottom of the stairs. As I wanted to have a nice carpet remnant put down to warm the room up once I stud out and drywall the place. I am 90% sure that the floor will not see water again but when it comes to old houses and unpredictable weather I don’t want to take any chances. Now if I were made of money I would have someone else, but I’m not. I found this GREAT product http://www.subflor.com/home.asp and actually saw it in the store. The stuff is the greatest, 5/8 thick including a moisture barrio and dimpled rubber bottom to keep air under the floor and allow for the occasional water to just run under it. How great is that! The squares are 2 feet square so that would be 175 tiles to buy for me at (yes get ready for it) $4.75 each. That’s 850 bucks with tax. A LOT of cash for only part of a do-it-yourself basement redo. I WISH I had that kind of money because this product is amazing but I can’t afford it. Is there another alternative for me? It seems obvious that I need a sub floor to keep the carpet both dry and warm and it seems obvious that I need to make sure that there is an air pocked under it to allow water to run to the drain just in case but 850 bucks is a TON of cash for me. I probably could stud, drywall, get my new electric done AND get cans and other lighting for 850 bucks. IF I have no other choice I will just have to wait until I get the cash to get them but if anyone has another alternative that I would be eternally grateful.