23/32-in (just under 3/4-in thick) x 4-ft x 8-ft OSB Subfloor

Charlotte Wood Middle School, Danville, California

It was 1991, and our company was framing the entire middle school. The Charlotte Wood Middle School was built out of Douglas Fir Lumber, Pressure Treated Plates, and different kinds of Plywood. I negotiated a contract with a lumber mill in Oregon to provide all the dimensional lumber for the project. I had lumber being delivered from their mill for months. GREAT PROJECT! Rick Aguilar - Cost Estimator

Overview

• The 23/32-in x 4-ft x 8-ft OSB Subfloor Panel is a heavy-duty, engineered wood product built to handle the toughest residential and light commercial flooring projects. At just under 3/4-inch thick, this OSB (Oriented Strand Board) panel provides outstanding strength, stiffness, and durability—making it a top choice for subfloor systems where long-lasting performance is critical.

• Constructed with wood strands and high-performance resin, this panel resists warping, shrinking, and splitting. When installed properly, it helps reduce floor squeaks and provides a smooth, stable surface for a wide variety of finished flooring materials such as hardwood, laminate, carpet, or tile. Many panels feature a tongue-and-groove edge design, ensuring a snug fit that locks panels tightly together.

  Best Uses:

  • Subflooring in new residential construction

  • Home remodels and room additions

  • Flooring base for carpet, tile, hardwood, or laminate

  • High-traffic areas such as living rooms, kitchens, or hallways

  • Durable base for garages, sheds, and workshops

  Practical Project Ideas for Homeowners:

  • Second Story Additions: Provides the structural strength needed for upper floors.

  • Kitchen Remodels: Creates a sturdy base for heavy appliances and tile flooring.

  • Workshop or Garage Floors: Strong enough to support equipment and frequent use.

  • Tiny Homes or Cabins: A durable, affordable foundation that holds up to daily living.

  • Floor Repairs: Replace sagging or weak subfloor panels with this thicker OSB for added support.

  If you’re planning a project that demands extra strength and long-term reliability, the 23/32-in OSB Subfloor Panel is a dependable and cost-effective choice.

• Why Choose OSB Sheathing?

  The 23/32-in x 4-ft x 8-ft OSB Subfloor Panel is a strong, cost-effective solution designed for residential and light commercial construction. Engineered with wood strands and waterproof resin, OSB (Oriented Strand Board) provides reliable structural performance while resisting warping and splitting.

  This panel is specifically manufactured for subfloor applications, making it an excellent choice for new builds, remodels, or repairs. At nearly 3/4-inch thick, it offers durability and stiffness underfoot, helping to reduce squeaks when properly installed. The tongue-and-groove design (when included) allows panels to lock tightly together, creating a solid and stable floor base.

Ask Rick, example:“What’s the best plywood for subfloors? or “When should I use treated lumber instead of regular lumber?”

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