Guitar Frets guide
How to Set Up and Use Guitar Frets
A guitar that doesn't play cleanly usually has a setup problem, not a hardware problem. Here is how to check and set up your frets for consistent, buzz-free performance.
Getting the most from guitar frets means understanding what they are, how they work with your instrument's setup, and what to do when they stop performing correctly. This guide covers the practical side: how to set up your guitar so the frets work as they should, how to identify fret problems, and what a professional setup involves.
Step 1: Check Neck Relief for Guitar Frets
The neck should have a slight forward bow — called relief — to allow strings to vibrate without buzzing against frets in the middle of the neck. To check relief, hold down the first and last fret simultaneously and look at the gap at the 7th or 8th fret. There should be a small but visible gap. A perfectly straight neck or a backbow will cause buzzing in the middle register.
Relief is adjusted via the truss rod — a metal rod running inside the neck. Turning the truss rod nut clockwise tightens the rod and straightens the neck; counter-clockwise adds relief. This is an adjustment most players can make carefully with the correct hex key or wrench, but if you're unsure, a luthier should do it. Incorrect truss rod adjustment can damage the neck.
Step 2: Set Action at the Nut and Saddle
Action — string height — interacts directly with how your frets play. If action is too low, strings fret out or buzz against the metal. Too high, and the guitar is harder to play and may intonate poorly. Action is set at two points: the nut (near the headstock) and the saddle (at the bridge).
Nut slots that are too deep cause buzzing on open strings. Saddle height affects action along the neck. On most electric guitars, saddle height is adjustable with a small hex key. On acoustic guitars, the saddle may need sanding or shimming to set correctly.
Step 3: Check Fret Level
Uneven guitar frets are a common cause of buzzing and intonation problems that resist fixing through normal setup adjustments. A high fret anywhere on the neck will cause a note to buzz against it. To check, play every note on every string and listen for buzzes that don't clear with reasonable finger pressure. A rocker (a small straight edge) across three frets will also reveal high spots.
A fret dress — levelling all frets with an abrasive, then crowning and polishing — corrects uneven fret height. This should be done by a luthier and takes one to three hours depending on the extent of wear or unevenness.
Step 4: Set Intonation
Intonation ensures that fretted notes are in tune all the way up the neck. To check, play the open string and then the fretted note at the 12th fret — both should read the same pitch on a tuner. If the 12th fret is sharp, move the saddle away from the neck; if flat, move it toward the neck. Most electric guitar saddles are individually adjustable.
Correct intonation depends on accurate fret placement during manufacture. On a well-built instrument with correctly placed guitar frets, proper intonation should be achievable through saddle adjustment alone.
Recognising When Frets Need Attention
Signs that your guitar frets need a dress or replacement include: notes that buzz or choke out on specific frets even with correct setup, grooves or flat spots visible on the crown, notes that fret sharp as you press harder, and intonation that cannot be corrected through saddle adjustment. A luthier can assess the condition of the frets during a setup inspection.
For an overview of materials and sizes, see our full guide to the types. For beginners who are still learning the neck, see our beginners' guide.
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