Help! Two years ago I had sliding glass doors (6 panes total) installed to enclose a covered lanai on my condo. Today, one of the doors spontaneously shattered. It is a door I have rarely opened, and haven't been near it in weeks.
The contractor that installed them said it is not unprecedented for this to happen, as the building may have settled (building is 30+ years old) or an event that happened weeks ago may have triggered this. Is this bull? I find it hard to believe this can happen without apparent incident.