HUMIDITY AND YOUR PIANO
Your piano is made from organic materials, such as wood and leather, and will respond poorly to extremes of humidity.
High humidity drenches the organic wood and leather parts with moisture, aging them and making them break down much more quickly. In addition, high humidity will affect the tuning, making more frequent, expensive tunings necessary.
Low humidity, particularly that from high heat, especially wood heat, will dry out wood and make it crack. On a piano, there are two main areas that will be damaged. The sound board, the flat wood surface just below the strings, will warp and separate from the frame, causing strange sounds and buzzing. The entire resonance of the piano can be lost from this.
Also, the pin block, the wooden block that holds the tuning pins, assuring proper tuning, can crack, making it impossible to keep even the finest instrument in tune.
Many of the small parts damaged by extremes of humidity can be easily replaced, but replacing the sound board and pin block is the equivalent of a heart-lung transplant, and should be avoided at all costs.
There are devices to help you:
Get a humidity gage (at walmart about $10.00) and keep the humidity as near 45% as possible.
You can add moisture by using a common vaporizer to keep a piano in good shape in a dry, low-humidity environment. They are very inexpensive and work well.
If your humidity is too high, the only solution is a dehumidifier. You could get a room dehumidifer or you can get a piano dehumidifier installed with a humidistat control for about $200.00
A piano is designed to last perhaps fifty to one hundres years, and then must be rebuilt, or junked. Rebuilding a fine grand piano can cost $15,000 to $25,000. Create a nurturing environment for you piano and you’ll be well repaid with an instrument that does not deteriorate as rapidly.