The bottom seal on our external sunroom door had been slowly pulling apart for the past year. This was allowing small bugs and the occasional water to enter into our sunroom. It was also unsightly with the tangled rubber strips laying about the floor. Something had to be done!
The (pretty easy) fix was to replace the door bottom with a new seal so that the weatherstrip would again sit flush with the threshold. No longer would insects and worms have easy entry to the sunroom. Also the bottom of the door looks a lot better too.