Hello all, I purchased a 2004 Fleetwood Sequoia a little over 2months ago. I thought I had found all the damage from the A/C leaking. It is now a complete rebuild while the roof is still attached. I wish I had a building. I found water dripping from foam once I got to it. so this is why I decided to fully rebuild. This roof has no wood other than the inside round over part the wiring is attached to. I’m replacing the sides with 3/4” plywood and the 1/8” wood utility board found at Home Depot. I also have had 11/2” x 3/4” thick aluminum welded to go where the A/C goes. The longer runs will go under the A/C bars on the ceiling. I will thru bolt to the roof where it will be attached to 11/2” aluminum tubing. The roof should not sag at all. I was hoping to glue the 1/8” utility board to the foam first the glue that to the roof. However I have noticed the foam runs in a different direction. I realize why this is. My question is will it be okay to do it my way?