Different TT construction

JBarca wrote:

theoldwizard1 wrote:

Look at cargo trailers. Most use a rounded piece of aluminum that joins the side wall on the vertical. Much less chance of it to allow water intrusion.

Yes, you are right! I never thought of that. Cargo trailers have a roof and siding joint that is much more robust. Same as a semi trailers. Many of these trailers live outside all the time and are towed many miles. Semi trailers are in millions of miles. Good point. I'm going to have to research this more.

Please do ! You sound like you have the knowledge/experience to understand what would be the best solution. If possible, I would also suggest looking at high end coaches, like Prevost. Rock stars aren't going to put up with water intrusion !

theoldwizard1 wrote:

JBarca wrote:

2. Part of this is a materials issue. The roof sealants and putty tape sealants for walls and non roof opening sealants are not a long life product. While many of the roofs do use a good quality butyl sealing tape, the caulking concept used on the roof is a weak link. And the putty tape used on the walls joints is just not a lasting product.

The sad part is, a $15,000 starter camper and a $65,000 fifth wheel have the same inherent issues.

Scary but true !

JBarca wrote:

I was fortunate, I realized early on and gave up on the roof caulk sealants back in 2009 and Eternabonded all edges and changed to stainless screws. Especially the gutter rail.

Many will think that going stainless is a large cost. It is not, if you source the screw on eBay/internet. Once you have determined the proper size screw, you can probably buy 100 of them for $20-$30. Imagine if Jayco bought them by the 100,000 how much the would cost (less than half of hat)

JBarca wrote:

I have been each year now pulling several groups of moldings, windows and door flanges etc off, taking out the putty tape that is failing out and putting high quality butyl in place with a Dicor non sag caulk as a secondary seal. This year I should be closer to completing a complete redo. 14 years and no leaks in the roof or walls. It was work and constant attention but it has worked out. Did have slide floor rot long ago. A fabrication issue with holes in the floor from day 1.

I have used 303 UV protectant on the roof and all things plastic or vinyl including the Dicor caulking. This has made a significant difference in slowing down the sun deterioration. Even the Dicor survives longer.

A lot of work, but you see the reward.