As a builder, moisture can be a concern after the sub-flooring goes down and before the structure is closed in. The time it takes to fully enclose a structure can vary during the build cycle due to weather, and water damage can cause significant delays.
One solution to help protect the sub-floor from rainwater damage during construction is to use LP® TopNotch® 350 Durable Sub-Flooring.
What is LP® TopNotch® 350 Durable Sub-Flooring?
LP TopNotch 350 Durable Sub-Flooring is an OSB sub-flooring designed to reduce the impact of moisture during construction.
LP TopNotch 350 panels feature the unique RainChannel® technology that helps drain water away during construction, offering added protection from moisture damage due to rain delays.
How Does the RainChannel® System Work?
Just as treads on a tire push water through its grooves to disperse rainwater, the RainChannel system uses a self-draining notch design on the panel ends and cut in the tongue to quickly channel water away. A moisture-resistant edge seal is also included to help resist water absorption.
This, along with its stability and great price point, makes it a popular choice among builders.


The system also offers a moisture-resistant edge seal that can reduce the need for sanding.
Thanks to the RainChannel system, LP TopNotch 350 Durable Sub-Flooring offers a limited warranty. LP backs LP TopNotch 350 panels with a 200-day "no-sand" warranty and a 50-year transferable limited warranty.
For a subfloor your customers will certainly appreciate, discover how LP Legacy® Sub-Flooring Adhesive can give you a sturdy and quiet sub-floor.