I have a sliding glass door leading to a small balcony in my new house. The slider is double-paned glass, as is the fixed door it slides over. There is also another fixed double-pane to the left of the door.
I haven't moved in yet, due to multiple problems after purchase, so I am just going over to work, let contractors in, and check up on the place. This afternoon, I went over to the house, and the glass in the fixed door (the one the slider passes over) had a spiderweb cracks in it, throughout the entire pane of glass. I could hear the cracks continuing, and I actually saw a few small ones form while I stood there. The glass is still in place, but it is shattered throughout the whole pane.
It appears that it radiates from a spot next to the frame, about 3/4 of a foot from the bottom. The door was fine last night, as far as I saw, and no one was in the house but a flooring guy, finishing some shoe molding and putting base in other rooms, so there doesn't seem to be any way it was hit. The pane that is cracking is the interior frame, so it apparently can't be from something outside hitting the window.
The temperature has been pretty cold here lately (between 0 and 10 degfrees), but again, the other panes are fine, and it is an interior pane. My only thought was an air leak between the panes, with a temperature differential, but I don't know if that is the case.
Any thoughts?