Just to clarify what Eddie stated qoute " You NEVER attach a metal roof through the ridges."
His statements are true, however they do make lap joint screws that are designed to be screwed thru the ridges to connect each sheet to each other. They also make a seal tape that is applied between the sheets under this ridge joint. For steeper roofs like 6-12 pitch the seal is not really necessary but it is recomended for flatter slopes like 2-12.
The road goes on forever and the party nevers end...............................................
