Elevate structural stability

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Product Literature

Product Specifications

Recognized as carbon negative by ASTM in 2023
Available performance categories from 19/32 to 1-1/8*
Can be used for residential and light commercial applications
LP TopNotch Sub-Flooring panels are certified by the APA

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Features and Benefits

Performance

Incredible strength, stiffness and moisture resistance.

Easy Installation

Self-spacing tongue and groove design speeds installation.

Innovation

Designed for optimum moisture resistance.

RainChannel^® Technology

Unique RainChannel notch system to help drain rainwater away during construction.

Sales Tools

Find out how LP TopNotch® Sub-Flooring can benefit your build.

8 Common Sub-Floor Install Mistakes

Portfolio Product Guide

Technical Documents

Get the details on sub-flooring installation, warranty and more.

Environmental Product Declaration

Building for Resiliency

LP TopNotch® Sub-Flooring boasts superior moisture resistance.

How Does Gorilla Glue® Technology Work?

Carbon Negative Product Portfolio

LP^® TopNotch^® Sub-flooring

LP^® TopNotch^® Sub-Flooring features a line of performance OSB sub-flooring available in two options to fit any building project.

How It's Made

LP® TopNotch® 350 Durable Sub-Flooring is manufactured with Engineered Strand Technology for a flat, strong and sturdy sub-floor.

Wood strands blended with thermal-set, waterproof adhesives are arranged in cross-directional layers and bonded together under extreme pressure
Notches cut into the panels contribute to RainChannel® technology
LP TopNotch 350 Durable Sub-Flooring product panels are surface sanded
Moisture-resistant edge sealant is applied to all LP TopNotch products

Advanced RainChannel^® Technology

Experience the industry-leading innovation of LP^® TopNotch^® 350. Featuring advanced RainChannel^® technology, it is designed to elevate every build, manage rainwater and prevent moisture-related issues during construction. Trust the consistent quality and superior performance of LP^® TopNotch^® 350 and ensure a durable, resilient foundation for all your projects.