Here's the roof.I inserted a pop rivet to indicate the hole and there is a low spot thanks to the warped brace.It's not very low,but it is the roof's lowest spot,thus that's where the water will pool and go through the hole.
Since you are going to the junkyard,why not just get a piece of sheet metal that will fit on the roof and put it on top of the hole on top of the roof, then just sealing it with something like climaclear or even silicone would work. Even if you got a sheet and just put it up there with some roofing screws, that way those don't leak either. You could probably go with stitch screws (lap screws) if there isn't anything to screw to. That way you wouldn't have to worry about screwing into the structure. Just metal to metal. Then seal all around the square sheet. Sort of like in the picture below, but pretend that the shingle roof is your roof.
Last edited by TedLeger; 02-25-2014 at 06:02 PM.
Reason: Added Picture