It means, in layman's terms, that the bridge saddle is too far away from the nut. A truss rod adjustment, crappy old strings, or a mildly warped neck wouldn't likely cause the issue.
- How do you adjust the intonation on a saddle?
- Does lowering saddle affect intonation?
- Why is my guitar intonation so bad?
How do you adjust the intonation on a saddle?
Fender-style Bridges
By adjusting the screw, the saddle is pulled closer to the bridge or further away. Turning the screw clockwise increases the length of the guitar string. If the fretted 12th fret note is sharp, adjusting the screw clockwise will improve intonation.
Does lowering saddle affect intonation?
No, it sounds fine, not out of intonation. I just thought that sanding the saddle down means also adjusting it for intonation. There is such slight intonation change within normal usable action changes as to be insignificant in most cases.
Why is my guitar intonation so bad?
If the tops of your frets are too flat, dented, or you just had crappy fretwork done by a bad guitar tech, you can have trouble setting intonation. If this is the case, you'll probably have other issues too, such as fret buzz or notes fretting out. Overly flat frets can cause intonation issues.