Treated vs. Untreated Lumber: What's The Difference?

When it comes to choosing the right type of lumber for your construction or DIY projects, understanding the differences between treated and untreated lumber is crucial. Both options have distinct qualities and are designed for specific applications. Armstrong Lumber can help you find the right building materials for your next commercial or residential remodeling project by explaining the differences between these types of lumber.

Learn more about the difference between untreated and treated building materials and get a quote from our Corpus Christi, TX, lumber store now!


What is Treated Lumber?

Treated lumber includes blanks, boards, and other pieces of wood that have undergone a special chemical treatment. This treatment is designed to enhance its resistance to moisture, insects, and decay and involves pressurizing the building materials with chemicals, such as alkaline copper quat (ACQ) or copper azole (CA), to create a barrier. Treated lumber is identified by its greenish tint.


Recommended Uses for Treated Lumber

  • Outdoor projects: Treated lumber is ideal for constructing outdoor structures such as decks, fences, and playground equipment due to its high resistance to rot caused by exposure to weather elements.

  • Ground contact: When wood comes into contact with soil or water, it is prone to moisture damage. Treated lumber is best suited for applications where it will be in direct contact with the ground, such as posts for retaining walls or foundations.


What is Untreated Lumber?

Untreated lumber, also known as "raw" or "natural" wood, hasn't been treated with chemicals to change how it reacts to the world around it. This type of wood from our local lumber yard retains its natural appearance and color and is commonly available in various species and grades.


Ideal Projects for Untreated Lumber

  • Indoor projects: Untreated lumber is often preferred for interior construction, cabinetry, and furniture due to its natural aesthetics. It can be painted, stained, or left untreated for a rustic look.

  • Above-ground applications: If the wood is adequately protected from moisture and insects, untreated lumber can be used for above-ground projects like framing, trim, or decorative elements.

Find Your Building Materials At Armstrong Lumber

Choosing between treated and untreated lumber ultimately depends on the specific project requirements, location, and budget. Always consider the intended use and the specific qualities of each type of lumber to ensure optimal results in your construction endeavors. Get all the building supplies you need at our Corpus Christi lumber yard now!

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