The opening(s) in a window between mullions and muntins through which light enters an interior space. A 6:6 window is a window that has six lights in the upper sash and six in the lower sash.
« Back to Glossary IndexThe opening(s) in a window between mullions and muntins through which light enters an interior space. A 6:6 window is a window that has six lights in the upper sash and six in the lower sash.
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