Hi,
I did notice the same thing and I also noticed the outside wipe seal is curled up and doesn't seem to do much to help the situation. I will bring that up with my dealer as well. As far as dust and such, I would just stuff the gap under the slide from the inside using a damp towel or rag for those storms that blow junk around until a fix is provided.
Please keep this thread updated. I am also concerned about this because we hang out in the deserts and dust does blow around. All that grit winds up on the floor and that will scratch it all up. I already have a thread seeking advice on how to polish up the damage caused by grit on the floor.
Our rig is drafty on windy days, blocking those breaks in the seals would help that too.
I will update this thread if Thor or my dealer finds a fix.
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