Check out of these videos that will help answer your questions you may have about a metal roof and also some tips on how to install you own. All of the video's below are good representations of how to handle several different details on a roof. Your roof may have site specific requirements and these videos are strictly suggestions on how to handle them.
INSTALLING YOUR OWN METAL ROOF TIPS
YOUR ROOF MAY HAVE SITE SPECIFIC REQUIREMENTS AND THESE VIDEOS ARE STRICTLY SUGGESTIONS ON HOW TO HANDLE THEM!