The Best Value In Premium Sub-Flooring
Now With Proven Protection Against Termites and Fungal Decay
LP® TopNotch® 350 Premium OSB Sub-Flooring With SmartGuard® delivers strength, stiffness and premium moisture resistance at a great price. It creates a strong, smooth surface ready for your finished flooring application. The easy, self-spacing tongue-and-groove profile speeds installation with no special tools or handling. Our proprietary SmartGuard process provides lasting defense against termites and fungal decay. Backed with a 100-Day "No-Sand" Warranty and a 25-Year Transferable Limited Warranty.