100 year old brick house with a new front door. The door is awesome at stopping the cold, but there is a space under the door where cold still comes in. I originally put some fiberglass pink insulation in there, but that didn’t do much. I think I need to stop the air flow better.
One option is to fill it with spray foam. But I’m not sure if I want everything glued together for all eternity. And I believe you should only fill cracks, not voids.
Another is to cut a piece of plastic and glue/caulk it along the front (so the insulation is behind).
Any other ideas?