At every step of this project I wanted to build in a layer of protection against water damage. The first step was to paint the outside of all the birch paneling and plywood with two coats of exterior paint. Next came the black stuff. It is Herculiner....waterproof truckbed liner that was painted on all the edges and around all the openings.
After the truckbed liner dried I added Protecto Wrap to the edges and around each window opening. It also went around the edges of the access panels. It is 4" wide and really, really sticky.
This last picture shows the last protection against water before the aluminum siding went back on. Tyvek house wrap. I wrapped the whole trailer up like a big christmas package. Every edge of the wrap was sealed with tyvek tape so that if a water droplet ever does come through the aluminum it will hit the tyvek and roll right down between the tyvek and the aluminum and out the bottom edge to the ground. That's the plan anyway!
These are the first two side panels going back on. I have a whole other post about cleaning, painting and mounting these puppies. Oh! And about the $50 paint job that took two whole weeks of daily painting. More on those details later.