vertical sash

**Vertical Sash**
A vertical sash refers to the upright, narrow frame or section within a window assembly that holds the glass panes. Commonly found in sash windows, the vertical sash allows the window to slide up and down or remain fixed, contributing to both the structural integrity and aesthetic appeal of the window design. This term is often used in architecture, window manufacturing, and home improvement contexts to describe window components that enhance ventilation and light while maintaining classic or modern styles.