Proper subfloor preparation is mandatory. After cleaning and evaluating the substrate for moisture and integrity, use a long level or straight edge to identify deviations. High spots are removed through sanding or grinding; low areas are filled with high-strength cementitious leveling compounds. Failure to level the substrate causes premature joint stress and potential structural failure of the flooring system.
Ask an ExpertInstallation and Preparation
What is the standard procedure for subfloor leveling before professional flooring installation?
Standard subfloor leveling involves inspecting for high spots or dips, grinding down protrusions, and applying a self-leveling underlayment or patch compound. The surface must be brought within the specific flatness tolerance, typically 3/16 inch over 10 feet, for a successful installation.