Making a dulcimer humidity resistant?
Instruments- discuss specific features, luthiers, instrument problems & questions
I really don't think this a big issue. People along the Pacific coast have played stringed instruments for many years. People buy and play lots of acoustic guitars from inexpensive Asian models to high end Taylors and Martins. These instruments receive no extra treatment for humidity control. The outsides are finished and the insides are not. Build her a dulcimer. The general rule of thumb is that if you are comfortable, the dulcimer will be comfortable.
Ken
"The dulcimer sings a sweet song."