An ORIEL window is a type of window that projects from the wall of a building and is supported by brackets or corbels. A DORMER window is a type of window that is set vertically in a roof slope, creating an additional space in the attic or upper floor of a building. A CASEMENT window is a type of window that is attached to its frame by one or more hinges at the side. A BAY window is a type of window that projects outward from the exterior wall of a building and forms a BAY in the room. A REAR window is a type of window that is located at the back of a building. Finally, a SASH window is a type of window that is made up of two parts, or sashes, that slide vertically past each other.