It may seem like you would know when a roof collapse has happened (and when you could claim it on your insurance policy). But when you think about it, roof collapse is more of a process than a single event. It doesn’t just collapse out of nowhere. The collapse begins when the roof shows signs of distress. Prolonged distress on the roof--from the elements, or time spent delaying repair the roof--may mean collapse is imminent, even if the roof is still intact on the building. And of course, roof collapse is complete when the roof crumbles to the ground and has to be completely replaced.