I'm currently trying to find a solution to insulate one of the corners of our garage. The wall are framed with 2" x 6" lumber. To insulate one of the tricky corners, I only have about 1" to put the insulation in (see photos below).
I was thinking of going with spray foam. I have a polyurethane spray foam kit but the nozzle won't be able to spray deep enough inside the space. Another option would be to use those spray foam cans but I'm not sure it would work.