One of the new windows upstairs developed a massive crack, seemingly overnight. Since it’s still under warranty, the window company sent someone (the same person who installed the windows, actually) to replace the pane. When he’d disassembled the vinyl cladding to insert the new piece of glass, he found his initial suspicions as to the failure confirmed – an inch-and-a-half long chunk of glass was nicked out, probably during factory construction. This created stress points that the cold weather exacerbated and caused the pane-length crack.
