Can anyone who attended this session post some notes on the pros and cons Jim shared about different roofing materials? Outside of cost, I am wondering why more people in our region have not installed metal roofs. With their high durablity and low maitainance, they seem ideal. I see metal roofs used in commercial, and park shelters, but not residential. Is there some major issues with them? Where I come from in South Africa everyone built with them, but that is an entirely different climate. Any info you have would help.