Pressure treated lumber is the go-to choice for outdoor builds that must stand up to moisture, decay, and insects. Infused with copper-based preservatives under pressure, this treated wood resists rot and termites far longer than untreated boards, making it ideal for decks, fence runs, pergolas, retaining walls, play sets, docks, and garden structures.

Choose the right rating for the job. Above Ground is lighter and great for deck boards and railings with good airflow. Ground Contact is formulated for posts, 4x4s, 6x6s, framing near soil, and any spot that stays damp. Look for stamps showing retention levels and treatment type (ACQ, CA, MCA), and consider KDAT (kiln dried after treatment) for straighter, more stable results and quicker finishing.

Plan hardware compatibility. Use hot‑dip galvanized or stainless steel screws, nails, hangers, and bolts labeled for treated wood to prevent corrosion. Seal all end cuts with an end‑cut preservative to maintain protection.

Build confidently with common sizes like treated 2x4, 2x6, 2x8, 2x10, 4x4, and 6x6, plus deck boards and timbers. Many products are Southern Yellow Pine for strength and fastener holding, with options in other species to match local supply.

For best appearance and longevity, allow new pressure treated lumber to dry before staining or painting; test by sprinkling water—if it absorbs, it’s ready. Apply a water‑repellent sealer and maintain it every 1–3 years depending on exposure.

Work safely: wear gloves and a dust mask when cutting, collect sawdust, and never burn treated wood. For planters or raised beds, line the interior if direct soil contact is a concern.

Store boards flat, off the ground, and supported to reduce warping. Buying certified wood (such as FSC) supports responsible forestry. With the right grade, hardware, and finish, pressure treated lumber delivers durable, cost‑effective performance for outdoor projects. Backyards, marinas, and job sites.