I've only lived in two houses, in my adult life. I built both of them. The first one, a had insulation blown on the inside of the foundation. Electric company had a program going, where they actually paid for it (sorry Grit, I been sucking on the government tit my whole life). I never could tell it was doing anything. It might just be this cold snap, but it seems like this house is drafty. Thinking of insulating under this one. Which is better bats under the floor, or insulation sprayed on the blocks? I should say, I have 3 sump pumps under my house. Me and all my neighbors are setting on a crider soil.