Shingled roof needs bigger slope
We have a mobile home with a 12 x 56 addition across the back. The addition roof spans about 20 feet from the peak to the end with a very small slope. My husband has been shoveling the roof every winter but it's a chore he'd like to be done with.
We'd like to put a metal roof on and make the slope much higher so the snow would come off. He's going to extend the new peak out over the peak that is there now, which would give the back the slope it needs. Would he have to take the shingled roof off first or could this be done over the shingled roof? Any tips or suggestions welcome.