A dishwasher includes a treating chamber for receiving dishes for treatment according to a cycle of operation and a door assembly selectively moveable to close an access opening to the treating chamber, the door assembly comprising a window assembly comprising first and second spaced window panes defining an intervening vacuum sealed chamber, a window assembly support frame provided on the door panel, and a seal provided between the window assembly support frame and the first and second panes and encapsulated by the window assembly support frame.