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23 February 2007: A "Quick" Soundboard repair.
Part 2
***All repairs shown here are for illustration ONLY!!! Classicpiano can not and will not be held liable for any problems that arise for following and utilizing this information!!! By reading this material and/or clicking any follow-up links below, you agree to hold Classicpiano harmless. ***
 Next we will support the bottom of the soundboard before applying downward force to the soundbaord from above. We are trying to keep the soundbaord "crown" in place, if not add to it from years of downward pressure from the strings on the bridges pressing down. Therefore, we will attempt to push the sounbaord up form below, ever so slighly before pressing down on it.
We are under the soundboard here looking at shims in place to give upward pressure under the rib. There must be support underneath for the downward pressure from up above and these shims do the job. These shims can be bought at any lumberyard, Home Depot or Lowes. Although you can not see them, they are squeezed between the top of the beam and the bottom of the soundboard. They are pushing up ever so slightly. Note this has already been glued, I am documenting after the fact, hence the white on the beams and soundbaord .
We are under the soundboard here looking at a jack in place to give upward pressure under the rib. There must be support underneath for the downward pressure from up above and this leg support does the job. The wooden block fitted in above the jack is covered in plastic to protect the soundboard when glue is introduced. Difficult to see but this is a cutoff piece of 2x4 covered in a Zip Lock baggie. The baggie both protects the rib from marring and will not allow the 2x4 to glue itself to the rib should it come in contact with wood glue.
This arrangement is only used where the rib cannot be pushed up by a shims on the beam as above. Note, a little too much pressure will result in cracking a rib, something you NEVER want to happen.
Part 3 >
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