![]() There are three types of pressure-treated wood: borate, alkaline copper quaternary, and noncombustible. Also, the chemicals in treated lumber are corrosive to untreated steel, requiring more expensive galvanized fasteners. Because they’re much less expensive than pressure-treated wood, these framing materials are far more suitable for interior work. For instance, pine, spruce, and fir framing lumber encapsulated behind sheathing and siding doesn’t see the same type of exposure, so it’s not nearly as susceptible to rot or bugs. Pressure-treated wood is ideal for decks, posts buried in the ground, and even ground contact in finished basements, but it’s not always the best product for every job. Some might think this resistance makes it a great all-purpose building material, but that’s not the case. With the copper content in pressure-treated wood as high as it is, it’s resistant to rot and insects. Pressure-treated wood has particular uses and is not suitable for all applications. Copper then became the main ingredient used to treat lumber, a change that drove up pressure-treated lumber prices tremendously. Up until 2004, the main chemical used in pressure-treated lumber was arsenic, but the EPA banned it in the residential market because of health concerns. Manufacturers make pressure-treated wood by placing lumber in a vacuum and treating it with chemicals. Decks, railings, playground equipment, fences, garden beds, and other wooden structures require pressure-treated wood to stave off those life-shortening threats. Wood structures that see constant exposure to the elements are prone to rot from moisture and insect damage. Pressure-treated wood is wood that has been treated with chemicals that protect the wood from rot and insects. Keep reading to learn about this common yet very particular building material so you’ll know how best to use it in your projects. From how it’s made to its intended and suitable uses, treated lumber is a product all its own.īut what is pressure-treated wood? How is it treated? Is it safe? And what are those intended and suitable uses mentioned above? This list of seven important things to know will address those questions and more. While the base material is the same, pressure-treated wood is very different from typical wood products.
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