gbopp wrote:
You don't wait until your roof leaks to recaulk. You check it and caulk as needed.
Exactly ... you CAULK as needed. Trailers are manufactured with the seams CAULKED so it only makes sense to maintain that CAULKING with ......... wait for it ...... CAULK. :S
That aside, roof seams are easy to maintain, easy to spot any areas that may be failing ... but wall seams and countless wall intrusions are an entirely different matter, especially when the original sealant used is clear. I'd bet
far more newer trailers leak through these than through the roof yet most don't even give it any thought at all, apparently including the OP. :R