We've now been working on this for a few weeks. We removed the old materials and determined that the leaks appeared to be around the seam under the top trim. Camping World recommended Dicor Lap Sealant for all of the seams. I took off the trim, removed all of the old caulk and tape, applied a very thick bead between the aluminum roof material and the frame, and the reinstalled the trim which seamed to evenly distribute the sealant and create a good seal. I also used the self leveling sealant on the roof seams which appeared to level out very well. Monday night we managed to work extra late and get the first wall back up and the windows and door reinstalled and sealed with the lap sealant as well.
We had a steady rain on Tuesday and all looked good. Last night we had a quick very heavy rain and when I checked this morning there are a few wet spots on the new wall boards. Extremely frustrating at this point and I think I'm going to need to seal the entire roof. What have other people had luck with? I see that Dicor makes a paint type sealant but not sure if that is the way to go. I'd assume that it would take 2 gallons which would be another $100. I've already spent $200 on the lap sealant and $300 on new wall materials so the price tag is adding up fast! Any advice would be appreciated!