Rusting on metal roof

I am sorry to hear this. I am not sure what warranty coverage you might have had. You will need to track down the warranty you had on the product and then determine whether this is covered under the terms of the warranty. The other possibility would be whether a workmanship deficiency led to this problem. I doubt that it did but, if it did, that would have to be pursued with the installation company.

Sorry to hear of this. This is an unfortunate example of what some of the potential issues with a roof system that relies on penetration type fastener are. The metal can grow and shrink with temperature shift and allow those fasteners to rub some of the paint or galvanization off the metal. This can create a zone for oxidation and the gasket can allow seepage or bulk moisture movement. Most of the fastener based metal roofs have protocols for inspection of the fastener and gasket. As Todd referenced, this is just as easily an installation issue as well and the installation company should be engaged straightaway in conjunction with the manufacturer. Good luck and let us know what comes of it.