Hello, I have a question about insulation. After removing one of the drywalls and the old linoleum in the kitchen, I found that the plywood above the diagonal sub-floor doesn't go all the way to the wall frames exposing wide, about 1/2 in. gaps in the diagonal sub-floor (on the photo). I want to insulate them to prevent air leaks, pests and dust in the kitchen from the crawl space. What is a good way to take care of these gaps? I can think of stuffing them with caulk or spray foam from the kitchen side. Or apply some insulation to the entire floor from the crawl space, which I am not sure is possible because of its limited accessibility: I could barely crawl there squeezing myself between floor joists and the ground.
