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Sandra from Key West, Fl writes

Can Bora-Care be used on pressure-treated wood?

Answer:

Yes, Boracare can (and in many instances MUST) be used on pressure treated wood.  As a termite barrier under Section VI of the label it is required to be applied twice to exterior wall sill plate and that is always pressuretreated.  
All pressure treated wood that is cut or drilled MUST have a field treatment or end cut application in order to meet building code (including sill plate in a home - see IRC 2016 and AWPA Standard M4).  It is also  useful to treat pressure treated wood as the heartwood is not treated properly by pressure treatment (especially refractory species such as Douglas fir, and the transition wood of pine decking is often the first to rot out and will greatly benefit from a treatment with Boracare with Moldcare at 5 years (see Lloyd et al., 2013).

Posts, piles and poles also have the heartwood issue and can be treated but this is often best done with Jecta.

Answer last updated on: 11/06/2016

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