Pressuretreated
Pressure-treated wood is timber that has been infused with chemical preservatives under high pressure to improve resistance to rot, decay, and insect damage. The treatment process saturates the wood with waterborne or oilborne preservatives, enabling deeper and more uniform penetration than surface coatings. It is commonly applied to softwoods such as pine, fir, and spruce for outdoor use.
Preservatives: Historically, chromated copper arsenate (CCA) was widely used, but concerns about arsenic led to its
Applications and safety: Pressure-treated wood is used for decks, fences, retaining walls, garden beds, and other
Maintenance: Treated wood resists decay longer than untreated wood but can still degrade with moisture, sun,