Summer Cello Care: Bridge Height and Playability

Summer in parts of Canada can be humid—great for the outdoors, but a real test for your cello. Here are some tips for students and parents to recognize when a bridge change is needed and how to keep your cello sounding its best.

What Happens to Your Cello in Summer?

As humidity rises, your cello's wood absorbs moisture and expands. This causes the neck angle to drop, making the strings sit higher above the fingerboard. Vermont-based cello restorer Paul Perley explains:

"The various pieces of wood in your cello expand in such a way that they cause the angle of the neck to lower, resulting in increased string height above the fingerboard. The amount of increase varies greatly from cello to cello, but most players find it necessary to have a second, shorter bridge for summer playing."

UK cello maker Robin Aitchison, who has maintained the Royal Academy of Music's renowned stringed instrument collection, adds:

"Even modest changes in relative humidity can have a noticeable effect on the sound of the cello, and extreme changes can cause damage."

When Does the Bridge Need Changing

• Strings are hard to press: If your cello suddenly feels much harder to play, the action (string height) may be too high.

• Buzzing or muted sound: If the action is too low (rare in summer), buzzing can occur.

• Visible warping or leaning: If the bridge looks warped, twisted, or is leaning noticeably, it may need replacement or adjustment.

• Professional check: If playability changes, consult a luthier or your cello teacher—don't attempt to change the bridge yourself.

How to Measure String Height at Home

You can check the string height at the end of the fingerboard using a ruler (in millimetres). Place the cello on a flat surface, gently press a ruler against the fingerboard just beneath each string at the end (nearest the bridge), and read the distance from the fingerboard to the bottom of the string. If you're unsure, ask your teacher or luthier to demonstrate.

What's the Ideal String Height?

For most cellos, the optimal string height at the end of the fingerboard is:

- A string: 4–5 mm

- C string: 8–10 mm

These ranges are widely accepted as comfortable for playing and producing a good tone. Some professionals may prefer slightly higher action, but most students find these measurements ideal. Take these as rough guides, as string tension also factors into playability.

Signs of Humidity-Related Problems

- Open seams: Look for small gaps where the top or back plate meets the sides.

- Sticky or slipping pegs: Humidity can cause pegs to swell or slip.

- Unusual buzzing or muted sound: This may indicate a shifted soundpost or loose seam.

- Bridge warping: The bridge may curve or lean toward the fingerboard.

If you notice any of these issues, consult your luthier promptly.

Summer Cello Care Tips for Canada

- Control humidity: Aim for 40–60% relative humidity. Use a room dehumidifier or air conditioning during humid spells.

- Monitor with a hygrometer: Place a digital hygrometer in your practice space or case.

- Avoid the heat: Never leave your cello in a car or in direct sunlight.

- Store safely: Keep your cello in its case, away from windows and vents.

- Regular checkups: June is an ideal time for a luthier visit to adjust the bridge and soundpost and inspect for open seams.

Key Takeaways
- Don't try to change the bridge yourself: Always consult your cello teacher or go to a professional luthier.
- Not every cello needs a summer bridge: Don't forget, cellos or homes with good climate control may not require seasonal adjustments.
- If in doubt, get a checkup: Proactive care prevents bigger problems and ensures comfortable playing.

By monitoring changes in playability, maintaining stable humidity, and consulting your luthier, you can keep your cello in top form throughout the summer.

Sources:
Paul Perley Cellos
Aitchison Cellos
Strings Magazine

My collection of summer and winter bridges