As an aside, I can't for the life of me figure out what to call the last floor joist that runs parallel to the basement foundation. Does it have a name?
In my house, there is a little cramped gap an inch or two wide for me to access this gap. I'm wondering what the best way to go about insulating this space is.
After reviewing DIY kits for spray foam, I've decided based on friends' experience that hiring a contractor to spray the rim joists will likely save time and money and result in more insulation. I'm thinking that they will be able to fill this space, but I just wanted to confirm since most guides and conversation I've come across is mostly about the perpendicular joist spaces.