We bought used 2014 Lexington that has large gaps in wiper seal next to bottom rails. Anything can come in this way, including exhaust from generator which is a safety hazard! I talked to factory rep who said that forest river would never build anything like this. Also talked to previous owner that said nothing was ever done to slides. Who do I believe? It looks to me like wiper seal would have to be cut very carefully around rail and someone didn't take the time. I just want to get it fixed. Anybody else experience this?
We have a 2014 Lexington 300GSE that we purchased new. It has one slide for the dinette and couch. That slide has (2) racks and the outside lower seal is cut the same as yours where the racks move. I cut spacers from a large automotive wash sponge. Each set of spacers has three pieces. Two pieces are cut to slide over the wings of the rack and the third piece is made to fill the gap under the actual gear rack. I use these filler pieces when it is cold outside to reduce the influx of cold air under the slide. These fillers MUST be removed prior to slide retraction or you will have a mess. Ours has a rubber wiper seal along the in board edge of the slide floor which is attached to the interior edge of the slide floor and sweeps along the carpet as the slide extends out. We have never camped with the slide extended and the generator running so I do not know if we would have a problem. However, the exhaust pipe on our generator is routed over the rear axle and exits to the side of the MH behind the drivers side rear wheel. Hope this helps.
2014 Lexington GTS 300
2012 Jeep Liberty Toad
Our 2012 265DS Lexi is made exactely the same way from factory (we bought it new).
We use Window A/C insulating foam band 1 1/2" x 1 1/2" x 36" cut in pieces to fit the gap keeping cold air from entering.
So it does for mosquitos in warm weather.
As said, don't forget to remove before pulling slides in.