I need to install new flooring. I have an uninsulated craw / walk space. To install wood flooring I am told that I would need to moisture proof. For assorted reason, I cannot lay moisture barrier on the ground. Could it be attached to the underside of the floor? How and what would I attach? The other option is to install tile. To do this I will need to increase my floor strength with joist supports. I'm not sure which is the best option. I guess I could allways go with vinyl tiles. But I'm not convinced that vinyl tiles in the living room would look acceptable? I do not want carpet. Every option seems to have multiple complications and my brain is getting frizzled trying to decide which way to go. Any expert advice would be greatly appreciated.