I've got a problem with rot in the roof, i can smell it some times when it is hot. What happen was they put a new metal roof over the old shingles and never removed them or fixed the rotten roof boards. Can i do this with scaffolding? 10' scaffolding is 400lbs I guess one person can set this up? Then i would have to take it down and move it or roll at least at the back of the house. Would it be safe enough? Looks slippery this metal roof. It is steep too. I guess the pro roofer would use ladders and jump around like monkeys up there? Probably need to replace 10 of the roof boards.