That is a good point to those who dont know zip i cant remember the name of this stuff that they used in my trailer but if I'm not mistaken it has a 10 year warranty on it .
now that you brought it up i will call him and see for sure but i think it was ten years.
after having a lot of trailers and looking at way to many that's what made me decide to have one built the way i wanted and you can go and see it from the ground up witch i did and thought it was a nice option and i could make changes along the way if i wanted to and we did make a few changes .
a lot of trailer sales places do just that they only sale them not make them the same in my business i have people get made at me over some parts that they have trouble with and i help them all i can but i dont make those parts just like the other two big guy's we just sell them .
So i do know where it is easy to get made at the dealer but on the same hand if you are going to sell someones product you need also to stand behind it and get to the mfg and see that they do also.
Once again just my 2 cents worth.