Roof Sag on a Bigfoot

[WendyG]

We have just recently purchased a 17 foot Bigfoot and the roof has a sagged. Any ideas on how to repair this without gutting the inside to get at it.

[Kris St. Jean]

i have the same problem, alot of people doo just look down the page at some posts, but what i did is exchange that roof joint seam t bar for a aluminum t ba1 1 X 2 X 1/4inch and reinforced the corners with plate allowing it to be a tightfit bowing in upwards and it seemed to work but you truly cant ever get it right out just make sure its sealed well and supported inside for winter for snow loads