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Re: sound transmission, treated wood

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Andrew.
 
For permanently dry locations, I am specifying Boro-Care from Nisus [ www.nisuscorp.com ].  It's a Borate salt deposited by sprayer or brush.  It is non toxic [to people] and does not interfere with finishes.  It is water soluble, so cannot be used in exterior or damp locations.
 
Nels Roselund
Structural Engineer
South San Gabriel, CA
njineer(--nospam--at)att.net