I agree with Bob......
I'm 270 and I go up on the roof of my Magnitude but I do not stand or walk. I am on my hands and knees to spread the weight around as much as possible.
I also only go up when absolutely necessary. That's one of the reasons I put EternaBond Tape over every seam and joint on the roof. That keeps me from having to go on the roof to inspect the Dicor every 3 to 6 months. I only plan to hit the roof once a year to clean it and the air conditioners and just make sure everything looks ok.
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