LP® Structural Solutions
LP® TopNotch® 350 Durable Subflooring
LP® TopNotch® 350 Durable Subflooring is designed for exceptional stability to create a strong, smooth foundation for a variety of finished flooring. We back LP TopNotch 350 Subflooring with a 200-day “no-sand” warranty and a 50-year transferable limited warranty.
Resources & Technical Documents
Elevate Your Build
Trust the consistent quality and superior performance of LP® TopNotch® 350 panels and ensure a durable, resilient foundation for all your projects.
Elevate Structural Stability
Benefits of LP® TopNotch® Subflooring
Used by top builders and carried by leading suppliers, LP® TopNotch® 350 Durable Subflooring is designed for stability in both directions and is sanded to provide a more uniform thickness.
Performance
Incredible strength, stiffness and moisture resistance.
Easy Installation
Self-spacing tongue and groove design speeds installation.
Innovation
Designed for elevated moisture resistance.
RainChannel® Technology
Unique RainChannel® notch system to help drain rainwater away during construction.
Warranty Information
LP® TopNotch® 350 Warranty
Our products are backed by industry-leading warranties.
LP® TopNotch® Blogs
Resources for Professionals
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