I've given up all hope of trying to assess hail damage to asphalt shingle roofs during home inspections. It's a game. I've looked at dozens of roofs that were in fantastic condition, only to have roofing salespeople come behind me and insist that the roof had hail damage. When I find damage to a roof during a home inspection, I report it. But I don't go around with a microscope trying to determine what may or may not qualify for an insurance claim.