The built in cabinet in my 1923 MN home gets very cold in the winter. Drinks stored there have exploded in the past. It looks like the prior owner attempted to insulate it, but I'd like to try again and do a better job.
It looks like there's no real barrier between outside and inside. You can see the cabinet construction just hanging out the back of the house. They had stuffed fiberglass insulation into voids and then nailed a 3/4 piece of ply to the bottom.
My idea is to:
1: Caulk all the seams of the cabinet construction that I can see. Or wrap it in Tyvek?
2: Tuck new insulation into the voids. I've got a bunch of foam boards I could cut up, but maybe more fiberglass is better?
3: Cover the bottom with rigid foam and then spray the seams with Greatstuff.
4: Put new piece plywood under all that and spray the seams with Greatstuff.
Anything wrong with doing it that way?