I have a 100 year old house in the midwest. The original clay block foundation is still in pretty good shape with only 2 of the basement walls bowing in just over an inch.
My problem is that my basement gets very cold in the winter time and it makes my floors upstairs cold. I hired a contractor to spray foam the rim joists last spring and it seems to be making a small difference in the comfort level of the house. I notice fewer insects getting into the house, less dusty, air conditioner doesn't need to run as much. The same contractor gave me a bid to insulate and air seal the basement walls but the cost is substantial.
I'm wondering if I could do this myself and save a lot of money. I don't know exactly how to do this project and I don't want to trap moisture behind the clay bock walls creating mold and mildew.
Can you tell me how to do this?