I always have a question on roof nosing. The metal edge used in roofing. Now I know on the downward slope of the roof that the tar paper goes over the metal roof edge. And the shingles go on the paper. Now on the sides, and up the rake along the facia, does the metal go over the paper or under the paper or does it really matter. I have always been under the impression that metal needs to be isolated from wood too by tar paper or some other form of separation. Since metal gets cold and sweats, it keeps the wood from getting continuously wet. So does that mean the metal edging on a roof needs to be isolated by paper first, and then covered over by the first layer of tar paper. I guess I have over thought this whole process, and worry too much.
I am re-roofing my shop and garage and trying to make sense out of what steps to follow when I re-roof.
john