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Why 1 1/8 Plywood from Lowe's is the Secret to a Bulletproof Subfloor System in 2026

"The 1-1/8 inch plywood panel, often designated as Sturd-I-Floor, is the definitive solution for high-performance subflooring because it virtually eliminates floor deflection and joist-telegraphing. By utilizing this thickness, typically sourced from Lowe's professional-grade inventory, builders achieve a 48-inch-on-center span rating that provides a rock-solid, "bulletproof" foundation for heavy finishes like natural stone and large-format porcelain tile. The Engineering Behind the 1-1/8 Inch Standard In the 2026 construction landscape, the demand for open-concept floor plans and heavy interior finishes has pushed traditional 23/32" (3/4") su..."

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