Does humidity destroy guitars?

Guitars, beloved for their ability to produce captivating melodies, are not only musical instruments but also delicate works of craftsmanship. One of the most significant threats to these wooden wonders is humidity. In this article, we will explore how humidity affects guitars, the potential damage it can cause, and what guitar owners can do to protect their prized instruments.

The Impact of Humidity on Guitars:

Humidity, or the level of moisture in the air, plays a crucial role in the well-being of guitars. Both acoustic and electric guitars, despite their differences in construction and design, are susceptible to the effects of humidity.

  1. Wood Swelling and Shrinking:
    • Guitars are primarily made of wood, which is highly responsive to changes in humidity. When the air is humid, wood absorbs moisture and swells. Conversely, in dry conditions, wood loses moisture and contracts. These fluctuations can lead to warping, cracking, or structural damage to the guitar.
  2. Fretboard and Neck Issues:
    • The neck and fretboard of a guitar are particularly vulnerable to humidity changes. High humidity can cause the neck to bow or warp, affecting playability. Low humidity can result in fret sprout, where the metal frets extend beyond the edge of the fretboard, causing discomfort to the player.
  3. String Tension and Intonation:
    • Changes in humidity can also affect the tension of the strings and the guitar’s intonation. As the neck moves due to humidity, it alters the string height and can lead to tuning and intonation problems.
  4. Finish Damage:
    • The guitar’s finish, including the paint or lacquer, can be adversely affected by humidity. Excessive moisture can lead to bubbling or peeling of the finish, while low humidity can cause the finish to crack or become brittle.
  5. Mold and Mildew:
    • High humidity levels can create a breeding ground for mold and mildew inside the guitar, potentially damaging internal components and affecting sound quality.

Protecting Your Guitar from Humidity:

To safeguard your guitar from the harmful effects of humidity, consider the following measures:

  1. Use a Humidifier or Dehumidifier:
    • Depending on your climate, use a guitar humidifier to add moisture or a dehumidifier to reduce it in your guitar’s storage area. Maintain a stable humidity level, typically between 45% and 55%, to prevent extreme fluctuations.
  2. Keep Your Guitar in Its Case:
    • When not in use, store your guitar in its case to protect it from rapid changes in humidity and temperature. Cases provide a stable microclimate for the instrument.
  3. Invest in a Hygrometer:
    • Purchase a hygrometer to monitor the humidity level in the room where your guitar is stored. This will help you make necessary adjustments to maintain optimal conditions.
  4. Regularly Inspect and Maintain:
    • Periodically inspect your guitar for signs of humidity-related issues, such as warping or cracks. If you notice any problems, consult a professional luthier for repairs and adjustments.


Humidity, whether too high or too low, poses a significant threat to the well-being of guitars. To preserve these musical treasures and ensure they continue to produce beautiful melodies, it’s essential to control and monitor humidity levels in their environment. By taking proactive measures and providing proper care, guitar owners can protect their instruments from the potentially destructive effects of humidity and enjoy years of musical inspiration.

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