I noticed when I removed the cover on my 2014 178 this spring that the front corners seemed to be coming apart. I crawled under camper and discovered a tear in the membrane at the front edge. The screws were all gone from the bottom of the rock guard. The front fiberglass/laminate was pulling away from the floor in the middle as well. Decide to pull it apart and see how bad things were. The screws going into the rock guard at the top were fine. The screws through the fiberglass into the floor of the trailer had all pulled loose or were rusty. What a great way to fasten that into the end of the plywood...not. So the floor has only absorbed water less than a 1/2 inch back and the fiberglass luan piece appears to be mostly ok. I will leave it open for a few days to dry out but insulation isn't wet and don't believe there is major damage. However not going to be able to refasten wall to the end of the plywood without some modification. I did look on forum for post on this issue and found Mike Carters post that he had run some straps to support corners. Mike is it possible to get more info as to your fix, also saw you thought you potentially had a bigger problem you need to look at as well. I am trying to determine the best way to rebuild/ support the front edge all the way across the trailer but because of the lack of much for a frame it's a bit difficult to figure out how to fasten everything together and have it hold. Anyone dealt with this and have a recommendation?
I would also recommend to folks as part of normal trailer maintenance you check the membrane, if you could call it that, underneath where it meets the metal strip edge on front and back edge of trailer.
I see there are the beginnings of a problem on the rear edge of mine as well.
Thanks, Dave