JackUtah,
Well Sir, there is a possible simple solution to your dilemma. I don't know if you've heard anything about them or not but, there are quite a few folks in the RV world now that are have a "Rhino liner" type roof coating applied. When I was having some body work done on our coach, the company that does that fantastic body work, also installs or, applies that outstanding roof coating.
The prep everything needed, wood, seals, remove things, etc. and spray on that coating, approx. 3/16" to 1/4" thick. It's quieter and reflects way more of the suns heat than the factory roof did. And, it's all one piece. When I was there checking up on the progress of our body work, I was allowed to climb up the ladders of some really expensive coaches to check out the results of the application. It was just like looking at the back of a pickup bed. You couldn't damage that roof if you wanted to.
And the cost, at least to me, was outstandingly reasonable. There were rubber roofed coaches having it done, as well as fiberglass roofed coaches too. San Diego RV Center was/is the place that does it in that area. If you get interested, you'll have to look up who might do it in your area or, if it were me, knowing what I know and have seen, I'd drive a considerable distance to get it done.
Scott
