a little bird...... the question i would ask rob is are the grooves cut deep to accept frets or are they just for the lines??
A phenolic (sometimes called Richlite) fingerboard can definitely be fretted, but it behaves differently from traditional woods like rosewood or maple. Phenolic is a dense, synthetic composite material, so there are a few considerations:
Key Points
Durability: Phenolic is extremely tough and stable. It resists wear better than most woods, which is why it’s often used on fretless basses. This toughness also means it can hold frets securely once installed.
Workability: Cutting fret slots and shaping the radius is possible, but you need sharp tools and patience. The material is harder on saw blades and files than wood.
Fretting Process: Frets can be tapped or pressed in, but some luthiers recommend using glue (like hide glue or CA) to ensure they stay seated, since phenolic doesn’t compress around the tang the way wood does.
Existing Lines: If your bass already has fret lines cut into the phenolic board (common on fretless instruments with “lined” fingerboards), those grooves can be used as guides for installing actual frets. The challenge is whether the slots are the correct depth and width for fret tangs. If they’re shallow or narrow, they’ll need to be recut.
Tone & Feel: Fretted phenolic fingerboards tend to sound bright and articulate, with a snappy attack compared to wood. Some players love this clarity, while others find it less warm.
Risks & Considerations
If the fret slots aren’t properly prepared, frets may not seat well and could pop out.
Phenolic dust can be irritating when sanding or cutting, so protective gear is recommended.
Once fretted, the instrument loses the smooth fretless feel that phenolic boards are prized for, so it’s worth considering whether you’d prefer to keep it fretless.
If your lined phenolic fingerboard already has grooves in the right places, it’s not an “issue” to fret it—it’s more about ensuring the slots are cut to proper dimensions and using the right installation technique. Would you like me to walk you through the specific steps a luthier would take to convert a lined fretless phenolic board into a fretted one?