Where To Buy

LP TopNotch Sub-flooring 350

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

Where to Buy

View TopNotch 250

Product Benefits

Performance

Incredible strength, stiffness and moisture resistance.

Easy Installation

Self-spacing tongue and groove design speeds installation.

Inovation

Designed for optimum moisture resistance.

Sustainability

Wood sourced through programs certified under the Sustainable Forestry Initiative^®.

RainChannel^® Tech

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

Product Specifications

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 – The Engineered Wood Association and are manufactured in conformance with U.S. Voluntary Product Standard PS2.
Additional information may be found in specific LP product literature and in literature from the APA, whose stamp of quality assurance appears on rated LP OSB products. You may contact LP at 1-888-820-0325 (Toll Free). The APA publications desk number is (253) 565-6600 and their extensive literature is available at apawood.org.
Consider our other OSB specialty sheathing products designed for wall applications (LP OSB Sheathing, LP LongLength and LP LongLength XL) and roof applications (LP TechShield Radiant Barrier Sheathing).

*Performance category replaces the fractional nominal thickness used in PS2. The Performance Category is consistent with the panel thickness used in the U.S. model building codes.

TECHNICAL GUIDE

LP TopNotch Sub-Flooring

Learn more about LP TopNotch Sub-Flooring.

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^® Sub-Flooring is manufactured by the leader in strand technology for a flat, strong and sturdy floor.

Rectangular 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 Sub-Flooring 350 product panels are surface sanded.
Moisture-resistant edge sealant is applied to all LP TopNotch products.

Working Better Together

Product Literature