Just a random thought I had. I need a new roof, the plywood is sagging between the beams. I currently have a 30 degree pitch and would like to change it to a 60 degree pitch. Two reason for this, first the look and second I think it would add extra attic space that I could convert into a small room. So is this possible when replacing a roof to change the pitch. And by doing this would I gain more room in the attic.