LP® TopNotch™ Sub-Flooring

Engineered specifically for subflooring applications, LP® TopNotch® Sub-Flooring delivers the strength and moisture resistance you need at a price you can afford. Since climates and building practices vary, we offer three different products in the LP TopNotch line. All LP TopNotch products feature a self-spacing tongue and groove profile for easy installation, as well as our RainChannel™ notch system that helps protect against moisture absorption and edge swell. LP TopNotch products are backed by up to a 200-Day No-Sand Warranty and up to a 50-Year Transferable Limited Warranty.