Great question! Whether wooden benches are treated to resist insects really depends on the type of wood and where you're buying the bench from. Many outdoor wooden benches—especially those made from pressure-treated pine or cedar—are indeed treated to prevent insect damage, rot, and decay. Pressure-treated wood is infused with chemical preservatives that repel termites, carpenter ants, and beetles.
However, not all woods require treatment. Naturally insect-resistant species like teak, redwood, and cedar contain oils and resins that deter pests without chemical additives. If you're buying a high-end teak bench, it likely isn't chemically treated—just naturally resilient. On the other hand, cheaper softwoods (like untreated pine) are very vulnerable to insects and should be treated before outdoor use.
When you purchase a commercial bench, always check the product description. Look for phrases like “pressure-treated,” “termite-resistant,” or “naturally weather-resistant.” If it's untreated, you can apply a clear wood preservative or oil-based sealant yourself to protect it.
Remember: no treatment is 100% permanent. Even treated benches may need occasional reapplication of sealant or stain to maintain insect resistance, especially in humid or rainy climates. So yes, many wooden benches are treated—but it's always smart to confirm with the seller and plan for ongoing care. Hope this helps you choose the right bench!