| Pressure-treated wood that has been properly treated and installed for its intended end use can be expected to last for many decades. Ongoing tests sponsored and monitored by the USDA Forest Service’s Forest Products Laboratory confirm this finding. Test stakes of treated wood have been buried in the ground at various locations, stretching from the Mississippi Delta to the Canadian border. Data analysis indicates that CCA-treated Southern Pine stakes in place since 1938 have shown no failures at chemical retention levels of 0.29 pounds of preservative per cubic foot of wood, or higher. Our guide, Pressure Treated Southern Pine, is available as a free download from Publications.
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