4'x 8' sheet. With our precision-engineered tongue and groove system, AdvanTech subflooring panels help deliver a secure fit for dependable edge-to-edge support to prevent movement that can cause squeaks. Plus, our patented fastening guide helps jobs get done faster with fewer hassles, errors and callbacks. There's good reason to trust AdvanTech subflooring a combination of long-lasting strength, moisture resistance and nail-holding power. Combined with the polyurethane bond of AdvanTech subfloor adhesive, the AdvanTech Subfloor Assembly offers a panel-to-joist connection so powerful you will not hear a squeak, guaranteed.