A good way to learn about installing a metal roof is to read instructions and information offered by websites like HowStuffWorks.com. This site includes an article that explains the basic steps involved in installing a metal roof.
Gain a general sense of the work involved in installing a metal roof by reading through the steps in the article on HowStufWorks.com. First remove old shingles, and then and spread tarpaper over the roof's wood. Next, install metal edging around the perimeter of the roof and apply the sheets of metal.
The article also lists the materials needed to install metal roofing. These include tarpaper, a drill, a hammer, an extension ladder and the metal trim and roofing.