Plywood is the industry standard for subfloors when installing solid or engineered hardwood. Ensure the plywood is of sufficient thickness (typically 5/8 inch or thicker) and is securely fastened to the floor joists to prevent squeaking. The surface must be clean, dry, and flat, usually within a tolerance of 3/16 inch over a 10-foot radius. Checking for moisture content in both the subfloor and the hardwood boards before starting is vital to ensure long-term stability and product performance.
Ask an ExpertHardwood
Can I install wood boards directly over plywood?
Yes, installing hardwood boards directly over a plywood subfloor is standard practice. Plywood provides a stable, flat, and secure nailing or gluing surface, provided it is structural-grade, properly leveled, and free of moisture or contaminants prior to beginning installation.