I came up with a solution for weatherstripping a door bottom where a thick rug prevents a spring-loaded bottom sweep from retracting. I used a length of vinyl bulb weatherstripping, intended for a jamb installation, between a two-piece oak sill that I made up in the shop. I tacked the vinyl in place with brads, and then fastened the cap piece to the oak sill with brass screws. This way the vinyl can be easily replaced when necessary. However, there’s no foot traffic on the vinyl itself, and it’s above the grit line, so it should last quite a while.
Felix Marti, Monroe, OR