We have a metal building horse barn. The birds have destroyed the interior roof insulation. Will any coating replace this insulation? New foil or insulation board will most likely be torn apart. This is a common agricultural problem, and foam, new insulation board, fiberglass, etc. are just not solutions. Would any coating work, at least somewhat?
If the old insulation is completely removed so that only the underside of the roof is exposed, you could use an IRCC, interior radiation control coating, that would be sprayed on. STS and Solec are RIMA members that sell these products and you can find all the contact information on the RIMA website. You didn’t say what kind of insulation was up there, but many barn owners have found that a reflective insulation or radiant barrier stapled to the underside of the roof trusses or purlins as an effective solution. Birds generally don’t peck at it because it gives when pecked.