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In the red box at the floor an exterior photo would be heplful. That being said I would caulk that gap not use expanding foam. I would then use a piece of one by to close the cavity. In the yellow box I would remove the insulation and also seal off te opening. Pull a board in all cavities and rmove the insulation and close.
I would then drill a hole near the ceiling at each bay and blow in insulation to fill the cavity. Glue the plug back in the hole.
Last edited by drcoastline; 11-15-2021 at 03:50 PM..
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