The process involves applying a protective and aesthetic coating to lumber that has undergone chemical treatment to resist decay, insects, and fungal growth. This coating, typically paint, enhances the material’s appearance and provides an additional barrier against environmental factors. An example of this procedure is coating pressure-treated pine with exterior acrylic latex paint to protect a deck from weathering.
Properly coating preservative-impregnated lumber extends its lifespan and maintains its structural integrity. It also offers design flexibility by allowing for customization of color and finish, increasing property value. The practice of protecting such lumber evolved alongside advancements in wood preservation techniques and paint technology, becoming a standard procedure in construction and landscaping.