Compared to stacking a transom above a window, the simulated transom is structurally sound, easier to install, and costs less. The extra window brings added sunlight into a room and provides character and depth. It is created by enlarging the top sash of a double-hung window and adding a 31⁄2-inch profiled rail to the interior and exterior of the glass. The result is a fully operational window and sash in one frame that appears like a transom stacked above a window. It is available in multiple double hung shapes and sizes, including rectangular, segment, 1/2 round, 1/4 round and gothic configurations.