The first thing we did when remodeling our home was installed spray foam insulation. It makes a big difference in how comfortable your house is, especially if you have an older drafty one. We chose spray foam insulation because it is not as expensive as having fiberglass batts.
It’s thick and completely seals off any drafts. When I touch it, there is no hint that there is even a layer between the outside and my ceiling. This insulation worked so well that now I seal up every hole I can find around the house to keep cold air from coming in. Our last home had a lot of places where air would come through and make living uncomfortable, but here at our new place, we never have to worry about how hot or cold it is outside with these thick walls keeping us warm on those winters days and cool on the summer ones.