I've seen a few similar questions but the answers don't add up...
I would like to use some rigid foam insulation to insulate my rim joists. Here is the problem: everything I have seen shows putting the foam on top of the sill plate like this (via Family Handyman).
In my situation, my joists run into sloped concrete block:
If I stuck some rigid foam in those gaps it would be floating above the wall and sticking out 2". So what is the proper way for this type of joist?
My idea is to attach a 1x3 under the joists and set the foam on top of that. But I know a big part of this insulation method is sealing the rigid foam with caulk or spray foam. So would this work? Or will I just need to add some extra caulk to seal the small gap between the 1x3 and the wall?