Well yeah, material defects are warranteeable. In the context of this topic though, we are talking about a fracture. Unless the material or install related defect causes the crack, then it's a wear item.Actually not entirely true. Most people dont know that they will also pay to replace pitted windshields as well. They are more than happy to eliminate any possibility of a lawsuit/accident claim due to vision impairment caused by pitting glare in the sun.