My wife and I live in a home built in 1894. A serious amount of air infiltration occurs between the stone foundation and the rim/floor joists. On cold days (think -30 degrees), you can feel the cold air flowing in.
Insulating this area would normally be straightforward, but the stone foundation is 18-24 inches thick. This means that on the sides of the house where the floor joists run parallel to to the outside wall, in addition to the rim joist that aligns with the outside of the foundation, a floor joist (that is about 16" away from the rim joist) also sits on top of the foundation. This creates a highway for cold air along the wall.
We had the foundation tuckpointed, and this helped some.
To complicate things, the exterior of the house is stucco, and the rim joist is, of course, covered with stucco.
To stop the air infiltration, it seems that I need to do something with the air space between the rim joist and the adjacent (16" away) floor joist. But there is not good way to get to this space, as it doesn't seem reasonable to go into the outside stucco wall.
I've thought of drilling holes from the basement side of this floor joist every so often and putting some type of foam insulation into the space between the floor joist and the rim joist. That would be a lot of cans of spray foam, and there has to be a better way.
I am looking for suggestions on addressing these air infiltration issues. Hopefully there is a solution that does not involve restuccoing the house.
-- Bruce Leasure
Saint Paul, MN