Fret Slots Too Wide: Fixes for Guitar Builders 2026

Fret slots too wide plague luthiers, causing buzz and poor intonation. In 2026, precision tools make corrections straightforward for DIY builders and pros alike.

This article details causes, measurement techniques, and step-by-step fixes. Restore playability without full refrets, saving time and cost.

Diagnosing Wide Fret Slots

Use feeler gauges and fret rockers. Slots over 0.023" (0.6mm) for standard frets need attention.
  • Visual inspection under light.
  • Play test for dead notes.
  • Measure slot width precisely.

Causes of Excessive Slot Width

Common in bandsaw cuts or worn nut files.
  • Dull binding jigs.
  • Inaccurate fret saws.
  • Humidity wood expansion.

Step-by-Step Narrowing Methods

CA glue or epoxy fills work best. Dry fit first.
  • Clean slots thoroughly.
  • Mix thin CA with baking soda.
  • Press in, level, and recut.
  • Install frets with press.

Advanced Prevention Tips

Invest in quality jigs for future builds.
  • Zero-clearance inserts.
  • Digital calipers always.
  • Practice on scrap necks.

Frequently Asked Questions

Can I fix fret slots too wide myself?

Yes, with basic tools like CA glue and a fret slotting jig. Professionals recommend for valuable instruments.

How wide should fret slots be?

Standard: 0.020-0.023" (0.5-0.6mm) for medium jumbo frets. Match your fret tang width.

Will filling affect tone?

Minimal impact if done correctly. Epoxy maintains sustain better than wood dust fills.

What's the cost of professional refret?

$200-500 in 2026, depending on neck complexity and fret material.

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