Shimming Soundboards

[Bob Hull]

 I have often observed shimmed soundboards develop
another crack right beside the shim or the shim glue
joint fails after a few seasons.  Shims from new wood
or old wood can create problems if they are not at
practically the same moisture content level as the
board itself when they are installed.  I have not seen
a crack develop right beside an epoxy filled crack,
have you?   

Bob Hull


--- David Ilvedson <ilvey@sbcglobal.net> wrote:
> Couldn't old soundboards be used for shims?
> 
> David I.
> 
> 
> 
> ----- Original message
> ----------------------------------------
> From: "William R. Monroe" <pianotech@a440piano.net>
> To: Pianotech <pianotech@ptg.org>
> Received: Fri, 25 Mar 2005 21:21:13 -0600
> Subject: Shimming Soundboards
> 
> 
> >Greg,
> 
> >Not sure I understand.  Aren't all shims new and
> all boards that they would
> >go in old?  This would seem to imply that you are
> averse to shimming, no?
> >What is the concern?  Is there something about
> rates of
> >expansion/contraction due to moisture that differs
> from more recently
> >harvested wood?  If there is a concern in this
> regard, do we know if it is
> >substantiated in any way?  I'm not trying to be
> condescending here, only
> >very curious about the use of shims, whether they
> are useful or not, in any
> >degree of soundboard repair; or should we just
> stick to epoxy?
> 
> >Respectfully,
> >William R. Monroe
> 
> 
> 
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> 
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> 


		
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