We have the Rockwood version of the MicroLite. My dealer said it was ok to walk on the roof but when I did I heard cracking which made me nervous (note I'm only 170 lbs.). I looked in my manual and it says that if the unit has a ladder on the back from the manufacturer then it is fine to walk on the roof. If it doesn't have a ladder then it's best to lay down some plywood to help distribute the weight. That's what I have been doing ever since.
I'm seriously considering purchasing a Flagstaff 21 FBRS but I'd like to know if it has a walk-on roof. I know I could ask the dealer, but I always trust but verify. Anybody know for sure?
I bought a 2013 FBRS last month. Dealer walked on roof to install fan vent covers. I was inside coach at the time and heard no suspicious noise. No problem. Probably shouldn't make a habit of it, but to service roof area on occasion I would not hesitate to walk on it.