Building Materials Supply Expert John Michael Nixa Explains How to Choose Pressure-Treated Lumber
Detailed summary
John Michael Nixa explains how treatment ratings, moisture exposure, wood grades, and structural needs affect lumber choices for outdoor projects. MACOMB, Ill., Nov. 13, 2026…
John Michael Nixa explains how treatment ratings, moisture exposure, wood grades, and structural needs affect lumber choices for outdoor projects.
How do homeowners choose the right pressure-treated lumber for outdoor projects? A HelloNation article provides the answer, featuring insights from Building Materials Supply Expert John Michael Nixa of West Side Lumber in Macomb, Illinois. The article explains how homeowners can select suitable materials based on treatment ratings, moisture exposure, and structural needs.
What Is the Difference Between Above-Ground and Ground-Contact Lumber?
The HelloNation article explains that pressure-treated wood contains chemicals that help resist decay and insect damage. However, treatment levels vary depending on where the lumber will be installed.
Above-ground pressure-treated lumber is generally suitable for deck boards, fence rails, and other areas that can dry after rain. Ground-contact pressure-treated lumber offers greater protection for fence posts, landscaping materials, and supports exposed to lasting moisture.
The article also notes that ground-contact treatment may be necessary even when wood does not touch soil. Poor airflow and damp conditions can require stronger protection.
The article describes how rain, snow, and humidity can affect treated lumber over time. Even protected wood can absorb water, causing swelling, shrinking, or cracking.
Proper spacing between deck boards allows water to drain. Good airflow around fencing and other structures also helps prevent trapped moisture.
According to the article, checking treatment labels and planning for drainage can help homeowners select suitable materials.
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