How much weight does the roof of a trailer hold?

Not a good idea. Just thin fiberglass panels and aluminum braces don't hold much.

 

I wouldn't sit up there myself but if you wanted to you should be fine unless your chair has pegs for legs instead of a bar that would sit along the ground/trailer roof and you don't weigh half a ton. Think how much snow is up there sometimes, I've never heard of a trailer roof caving in due to snow. Might be a bit warm on the feet..

 

How much do you weigh? All of that weight is concentrated in the feet of your folding chair. If the roof is fiberglass, they barely hold their own weight. At a minimum you would need something like a wide plywood or chipboard panel between your chair and the aluminum roof. Some other driver may see your great idea and take your ladder while you are sunbathing. What's your backup plan?

 

Most roofs are flimsy plus dirty as heck . Bird droppings soot dirt etc build up over time ..

 

Let us know when you try . Video will be helpful too!!!

 

Where I am, OH&S requires tie off at heights greater than 10 feet. That'd be considered a safety violation here if someone reported it. Your rules may vary.

 

You can most likely find a spot on a nice day with your foldable chair then the top of your trailer I would guess.