The crucial element regarding treated lumber and paint adhesion centers on moisture content. Wood that undergoes chemical treatment to resist rot and insects is often saturated with water during the process. Applying paint to wood with excessive moisture can lead to poor adhesion, blistering, peeling, and premature paint failure. The longevity and appearance of a painted project depend significantly on allowing the wood to dry sufficiently.
The advantage of properly dried treated lumber extends to reduced maintenance costs and an improved aesthetic. Ignoring this waiting period can result in the need for frequent repainting and repairs. Historically, the understanding of wood moisture content and its impact on coatings has developed through experience and scientific study, leading to established best practices in construction and woodworking.