The pitch is not that steep and I've shingled roofs in the past so I'm not a complete novice, but I've never done a metal roof. I would love to repair what is there for $ reasons, but I have priced out materials for a metal roof and if need be I will do so. I definitely want to make sure before I move to the interior that the roof is leak proof! I do know that some of the leaks are due to nails that were driven into the metal and didn't make contact with the roof boards, the others I am assuming are at seams, but I have not climbed up yet and given it a real look over. There are 5 areas that leak. I have another question. Have you ever heard of using metal roofing to complete the interior ceiling? The home is 22 X 40 cathedral open ceiling with a loft at one end. I do not want to drywall and wood for the entire ceiling would be too expensive. If I would do this how would you insulate between an outer metal roof and an interior ceiling?