Product Overview

Available in three performance solutions, LP® TopNotch® OSB Sub-Flooring offers strength, stiffness and moisture resistance from the OSB leader. Tongue and groove design makes installation quick and easy. Our exclusive RainChannel™ self-draining system and a moisture-resistant edge coating fight moisture during construction, reducing the need for sanding.

LP® TopNotch® 250:
The Leading Commodity Tongue & Groove OSB Sub-Flooring

  • The best-selling commodity sub-flooring
  • Strength, stiffness and moisture resistance at a great price
  • Easy self-spacing tongue-and-groove installation
  • Moisture-resistant edge coating
  • Exclusive RainChannel™ self-draining notch system
  • 25-Year Transferable Limited Warranty

LP® TopNotch® 350:
Cost-Effective Premium OSB Sub-Flooring

  • Premium strength, stiffness and moisture resistance
  • Easy self-spacing tongue-and-groove installation
  • Moisture-resistant edge coating
  • Exclusive RainChannel™ self-draining notch system
  • 100-Day "No-Sand" Warranty
  • 50-Year Transferable Limited Warranty

LP® TopNotch® 450: Premium OSB Sub-Flooring
Added Density For Special Applications—Available Upon Request.