Cab Roof Replacement

[saddletramp]

Morning Guys I'm about to take my roof off my C-10cab to repair rush spots under it bleading throught I've been looking at all kind of threads my ? is glue or weld if I end up welding I saw a thread somewhere the guy doing it removed the spot welds half way down on the back window and cut above it and went in that way to weld the back seam I don't like the idea of welding up the seam in back of the roof cause of worping there would be no way to hammer and dolly it Thanks