Hello!
A small case of "what would you do?"
As you can see in the picture, we have windows to the floor, but there is a gap against the concrete slab of about 17mm. This is open directly to the metal on the outside, I was thinking of just putting in insulation+plastic sealed caulk but from the outside it's completely open under the sheet metal. No such "teeth" for mice, etc.
What would you do?