91Spirit

Thanks, Ed! I'm not quite ready to tackle this project just yet (working on installing a solar system first) but you're instructions are incredibly helpful. Last question (I think:-) - Did you place the galvanized u-type metal pieces on top of the existing/original aluminum framing in the roof? I haven't reached out to Winnebago yet but I've been told that they will send a diagram of the framing upon request. My thinking is that if I utilize the existing framing it will be stronger than just drilling through the roof.

Did you end up fixing the sag with this method? I also have a '91 Spirit 321RB and have been trying to figure out the best way to address the sag caused by the a/c unit. I've removed the a/c and replaced with a Maxx Air Vent Fan and the sag remains. If this worked for you, I'd love to see pics of the process.