As Bighammer said;if you have no vapor barrier, you won't have much luck with anything adhering to your floor no matter how you prep it up here in Northeastern Minnesota. I keep my garage heated all winter long but it is gauranteed to sweet every spring due to the fact that I have no vapor barrier.I should be kicked in the nuts for not putting down a poly vapor barrier before I had my slab poured but it's to late now!