Broken window on my glass door. what caused this?

Question

i woke up this morning, i went out side to my deck, pulled up the bline to look outside through the glass on my door, adn i saw it was cracked entirely.

the outside layer was not cracked nor was the inside layer, but yet there was a crack throughout the entire door.

i'm guessing the door has three layer's and the middle one cracked, but does anyone know how that happened?

Answer 1

typically the unit in you door will have 2 panes of glass.  the reason you cannot feel the crack, is that the glass remained in the same position.  once you use the door, it will begin to seperate and then you will be able to run your hand over it and feel it.  if the glass was installed improperly there may be a nail or other item inside the pocket were the glass is.  if you do not see a point of something impacting the glass, something hit the glass inside the door on the edge of the glass.