When wood is pressure treated, chemicals are forced into the wood to preserve it and make it resist rot, decay and insects. Three of the most common chemicals used to treat lumber are discussed below.

Wood is pressure-treated with chemical preservatives to prevent damage caused by insects and fungus. Concern about the toxicity of the chemicals originally used to pressure-treat wood led to newer ...

Pressure-treated lumber offers durability ... The chemicals in CCA-treated wood were found to be toxic and could leach into the garden soil over time. CCA-treated lumber is no longer sold in ...