What are the parts of a sash window? Here's a plain guide to the terminology.
A sash window is made of the outer frame, the sliding sashes themselves (upper and lower), the glazing within each sash, the balance mechanism that holds them in position, and the gaskets and hardware that seal and lock them.
Knowing the parts helps when you're discussing a repair or a replacement — particularly the balance mechanism, which is what fails most often on old timber sash windows.
The outer frame, the sliding sashes (upper and lower), the balance mechanism holding them in position, the glazing in each sash, the gaskets that seal, and the locks and lifts.
The mechanism that counterbalances the sash's weight so it stays where you put it rather than dropping. It's the part that most often fails on old timber sashes.
The moving panel that holds the glass — the part that slides.
Related guides covering this topic from other angles — different products, applications, or contexts.
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