<p>A sash assembly includes an outer sash having at least one groove, an inner sash having at least one groove, and a removable binder extending along a perimeter of a surface of the outer sash and inner sash. The binder is configured to engage the outer sash and the inner sash and to mechanically couple the outer sash and the inner sash together. The binder includes a plurality of protrusions. Each protrusion is configured to mate with one of the groove in the inner sash and the groove in the outer sash. Each protrusion includes a plurality of flexible barbs that are compressed when the protrusion mates with one of the grooves. The flexible barbs provide a force on interior edges of the groove to couple the inner sash and outer sash together.</p>
