What Is Pretreated Lumber?

Pressure-treated lumber is the result of a process that uses high pressure to inject a preservative into the wood. ... The chemical preservative used in the process makes lumber resistant to insects and moisture, and it can even protect the wood in severe weather climates.

What does pretreated wood mean?

Pressure-treated wood is wood that has been infused with chemical preservatives to protect the wood from rot and insects. ... The most important thing to understand about this pressure treatment is that the process is, by far, the best way to avoid harmful rot and insects, but does not prevent weathering and corrosion.

What is the difference between treated and pressure treated wood?

The difference between the two is that pressure treated lumber will resist the elements better than untreated due to chemical preservatives added, and so will maintain its integrity in conditions that would cause normal wood to rot.