I’m not that familiar with steel roofs. This valley is in a transition from a steep to a low slope area. It appeared that run-off from the steep slope would over shoot the valley and drive water under the panel on the opposite side of the vally. There was a lot of sealant used in some areas and none in others plus the thru bolts were rusted. Would there be a gasket under the panel at the valley to stop water intrusion?