The gap at the bottom of an interior door should be 2 inches from an unfinished floor.

Gap under exterior door threshold. A drafty door with chilly drafts/air blowing through. A door gap resulting in light under the door or peeking around the edges of the door. Gap under prehung exterior door threshhold.

If you are planning to install an interior door, the standard gap size between the door and an unfinished floor should be 2 inches. As well as existing doors that will be used a lot during. They had some bricks and mortar as a sill for the old.

Predrill holes in the threshold 3 inches from either end and one in the middle. Discussion starter · #1 · nov 20, 2012. If there is a gap under your door, you may need to make adjustments to the threshold or replace the sweep.

You want something taller there, with a bulb weatherstrip on top, probably. Then add door foam, trim and. Total cost was around $8k and i’d.

Remove/replace the strip with the green arrow (the threshold). A visible door gap between the door and door frame. Received 1,503 votes on 1,352 posts.

Expanding foam fills the gap in its. Probably a result of adjusting the door in the opening , not enough goop, too big a gap, or whatever. Gap between bottom of exterior door threshold and concrete fix :