We do not recommend applying Boracare or Termidor SC to firewood. Burning any type of insecticide would release the active ingredients into the air. Burning the wood without treating with any chemical would kill anything in it.
As the beetles emerge from the wood after it has been treated with Boracare they will die from ingesting the treating wood so there would be no worry of reinfestation.
If you plan on using pressure treated wood there's no need to treat the area or the wood but we would recommend doing a preventative treatment around your house. If the wood is not pressure treated then we would recommend to treat the private fence. You can do two things, the most recommended treatment would be to treat the new wood panels with Boracare, once dry you will need to stain the panels afterwards prior to putting them in place and using metal posts when putting your new private fence up. The second method is to do a trench treatment with Termidor around the fence, since it is considered a "structure". We don't recommend doing the treatment before you remove the old fence because the removal will disturb the treated areas.
Bora-Care can be applied to raw wood for the treatment or prevention of termites. It dries on clear and is made that way so you can stain, paint, or seal any piece of wood after using it. Please refer to the product label for complete mixing and application instructions.
No, Bora-Care can only be used on raw, untreated, unsealed wood. If you are trying to treat wood that is already stained or sealed, you either have to sand the finish off completely or your only other option is to drill holes in the areas that you see damaged and inject the Bora-Care directly into the wood; bypassing the stained layer.
When applying Bora-Care to structural wood in the home, you only need to apply the product once. It will last for the life of the wood. If you are applying to exterior wood like a deck, porch, or fence which is exposed to rainfall, then you would either need to use a water sealant after the Boracare is dry, or you would re-apply Boracare after about 3-5 years.