Gdetrailer wrote:
Don't expect any cargo trailer made after the '60's to be made all that well.
What percentage of vehicles on the road have leaking roofs? A very small percentage. And what percentage of the leaking roofs are trailers? Bet that would be high. And a high % of the powered vehicles that leak are MHs. And a very high percentage of trailers where somebody works to maintain the roof that do not leak are RVs. Now when you go shopping for a used cargo trailer, no matter what the size, there is a good chance it will leak. For most users, most trailers, a leak can cause damage to cargo much higher than the cost of a new trailer. If a trailer does not leak, the cost of ownership is so low, why sell? Most cargo trailers probably roll more miles in a year than the average RV will move in it's lifespan.
I mentioned my '67 Pete. I have no idea how many miles it had on it when I bought it in '75, but I put half million on it before I sold it. Roof of cab and sleeper made out of that alloy I cant say or spell, panels riveted together, just like all the others. My '76, was a outlier. Day-cab with a roof mounted AC. If the drain for that AC was stopped up,
and you got 1 side of the truck about 8 inches higher than the other, it would throw water on the driver. As long as I stayed on roads, the water would run down the back of cab. My '87, Day-cab, had about 500 lb rock dropped on roof. About a hour with a port-a-power, to get my headroom back. 2 years later, I sold the truck, roof did not leak. My '95 had over 3 million miles on it, no roof leaks.
The point of all this is to point out the technology to make a lightweight, damage resistant, long lived, and waterproof roof is out there. And no buyers of anything but RVs will accept the need to work on the roof all the time.