When I got my Thor Daybreak 22GO [same floorplan as your 22E] there was a significant air gap you could see daylight through where the rear wheelwell meets the side body pannels. The local dealer did a poor job of trying to caulk the gaps. I then took 3" flextape and bonded the underside floorboard to the sidewall [also prevents entry of vermin or moisture, as well as dust.
JC
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JimC
"Never promise more than you can give. Always give more than you promise."
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