[chandler48]

This is a commercial application, so what we say here may not apply. Using a door seal without an extension cord tearing it up would be ideal, but as a fail safe, the door sweep, as indicated in the second picture could help stop cold drafts as it should touch the threshold when the door closes. It should not scrape the floor material at all.

 

[chandler48]

The seals have several layers of "fingers" that roll across your threshold insert helping to create an air prevention area. Depending on the type of threshold you have, it could be adjustable via screws in 4 or 5 places. This helps to tweak the seal without making the door difficult to open or close. The sweep will work in conjunction to the seal as an added buffer so to speak. If your door fits the opening now without a seal, try a sweep to keep from cutting the door off.