The first problem is air infiltration at the floor joist voids where they are perpendicular to the wall. I didn't realize how much air was infiltrating until I ran a gas powered generator on the side of the house where the grade covers the wall. I discovered that the basement filled with exhaust fumes! Where I had the generator, the floor joists are perpendicular to the wall. There is about an 8" section that the joist cantilever out past the wall to hold a zero clearance wood burning fireplace/chimney assembly. I always thought the builder placed wood blanks at the wall in between the joists (I would have!). Apparently not
A skirt board covers the rest of the way. Fiberglass insulation is between each joist above the wall. I think there's another 16' in the same condition where the kitchen bumps 2' over the wall. 24' total that are just filled with fiberglass. -
What should I use to seal and insulate these voids?
After that one, here's the second question: What insulation technique/materials should I use on the below grade concrete walls and then the exposed wall? It will have to be an inside instalation, not going to dig up the two sides. Once last year when the outside temperatures were -12*F, the exposed concrete wall measured 22*F. Can't leave either of these two conditions unchanged when I hook up the Koker (finally).
I wouldn't have considered some of them myself. I would have spray foamed the inside of the joist/floor/wall space after blocking it with wood. Never considered the fire considerations.