Hi. a couple years ago my heat vents in the floor of my slab house rotted and I had to have them filled with cement to keep creepy crawlers from coming into the house. I had to put in a new heating and air cond. system so the put in an upward system in the attic. My gas bills are now horrible. So I asked a Home Depot worker what to do. I did have blown in insulation on the floor which was in the soffits and causing ice dams. Anyway I was told to clean up the blown in insulation, put in vents near the soffits, put a batt of insulation down with a wood floor covering, and put batts on the roof. Now I read where this is not a good idea as it can cause mold. I did about half the roof and it is plenty hot up there. So now what? What do I believe. Thanks for any help I get. Diane