Humidity and StringHeight

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sol512

Posts: 32
Joined: Oct. 23 2023

Humidity and StringHeight

I notice that my negra has a higher string action (at the 12th fret) in winter and a lower action in summer. The difference is about 0.5mm

This is the opposite of what seems to be the consensus from a few articles I have read on the web, theory seems to be: dryer = lower, humid = higher.

I live in a very cold area with extreme cold and super-low humidity in winter.

Could one of the resident luthiers please chime in and let me know if a flamenco guitars action goes lower or higher in winter?

I am wondering if something is going on with the guitar structurally or if its normal.

ChatGPT says the following: On many classical/flamenco guitars, the combined effect of a drier, stiffer top and a subtle change in neck curvature is that the strings end up farther from the frets around the middle of the neck, so the measured action at, say, the 12th fret increases.

but I place more stock in what the luthiers will say.

REPORT THIS POST AS INAPPROPRIATE | Date Jan. 17 2026 5:19:58