100 year old brick house with a new front door. Thee door is awesome at stoppiing 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?
Best Answer
That opening will be sealed off with a riser. Make sure it's a tight fit with no gaps. The horizontal pieces extend farther than the framing, so add wood to extend the vertical framing to make a 4-sided box that the riser mounts against. Caulk between the riser and that threshold "box" to seal it.
Beyond that, fiberglass batting like you show should be fine to fill the space.