1/2 in. x 4 ft. x 8 ft. Pressure-Treated CDX Plywood

Build with confidence using our Pressure-Treated CDX Plywood. Engineered for structural integrity and long-term durability, this plywood is chemically treated to resist the core enemies of outdoor construction: rot, fungal decay, and termite infestation.

The "CDX" grade refers to the veneer quality: the "C" face provides a solid surface, while the "D" back allows for natural knots and branding, all held together with exterior-grade glue ("X") to prevent delamination in high-moisture environments.

Key Features

Weather-Ready Protection: Pressure-treated to withstand ground contact or exposure to the elements.

Structural Strength: Ideal for subflooring, roof sheathing, and wall bracing where moisture is a factor.

CDX Grading: A rugged, utility-grade finish designed for projects where strength matters more than a sanded appearance.

Versatile Thickness: The 1/2-inch profile offers a perfect balance of rigidity and manageable weight.

Technical Specifications

Common Applications

Note: Because this product is pressure-treated, it is best suited for exterior structural use.

Outdoor Sheds: Flooring and wall sheathing for garden buildings.

Roofing Substrate: Underlayment for shingles in high-humidity climates.

Agricultural Use: Lean-tos, animal shelters, and fencing support.

DIY Projects: Raised garden beds (when lined) or exterior ramps.

Pro Tip: Always use hot-dipped galvanized or stainless steel fasteners with treated lumber to prevent corrosion.