 Cracks that have developed after the wood has been treated are highly susceptible to borers, insects and decay in the right conditions.Cracks need to be evaluated during an initial pile inspection to ascertain depth, location and treatment condition.Apply a liquid preservative to cutoff tops of piles and timbers by flooding them
with hot creosote (150 to 200 °F), pentachlorophenol in diesel oil, or copper naphthenate in mineral spirits.