Hey Guys : I need a vapor barrier to stop the cold and humid air from coming up from my damp, floods often, dirt floor basement. Half is about 6' the other is 2' high. The house is very humid inside its 60% +. With the heat blasting it goes down a little. I dont want to get any mold or mildew in the house(was an issue when i got the house). I have 4 mil plastic. I want to put that on the subfloor under the flooring Just beacuse it would be the easiest. But i think that would cause more mold. and if something spilled it would be wet for days. The other option is to staple it under the floor joists but i still have some plumbing and electrical to deal with plus i would like to insulate it just dont have the money for that right now. Anyone have any thoughts? PS you can save the stop the flooding speech I just got done replacing all the floor joists and replaced most of the foundation. I will get to that soon enough. I just need to get the family moved back in the house first.