To show what low humidity can do, I had a client who moved a Steinway grand (rebuilt) from San Francisco East Bay Area (RH approx 62%) up to North Shore Lake Tahoe where it snows. You folks in that kind of climate knows what happens. Too many of us in California never think of RH at all. Well I told her she had to have a DC put on it before the movers left. This was in January. They left without putting one on and came back 3 months later after the blizzard to a cracked board. It went well below 30%. Keep it stable as possible and close to 45-55. Randy Chastain On Jun 20, 2010, at 12:26 PM, Cy Shuster wrote: > The narrower range that humidity is controlled, the less damage to > the piano. But even a short excursion to the 25%-20% level, or > 80%-90% level, can do permanent damage. > > There are many guidelines available for wood preservation, such as > these from the Smithsonian: > http://www.si.edu/mci/english/learn_more/taking_care/biodetwood.html > > --Cy-- > > Cy Shuster, RPT > Albuquerque, NM > www.shusterpiano.com > http://www.facebook.com/shusterpiano > > On Jun 20, 2010, at 12:38 PM, allan at sutton.net wrote: > >> Cy, wouldn't the damage result from very high humidity in the >> summer followed by very low level ? Thank you for the great links. >> >> David, I will add this to my "testimonial collection" >> >> >> Allan Sutton, m.mus. RPT >> www.pianotechniquemontreal.com >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100620/2ddcff3b/attachment-0001.htm>
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