Subfloor flatness is critical for LVP longevity. Most manufacturers specify a tolerance of 3/16 inch deviation within a 10-foot span. High points must be ground down, and low points must be filled with a high-quality cementitious leveling compound. Failure to meet these requirements causes the flooring to flex under weight, which puts excessive strain on the locking joints, eventually leading to separation, breakage, or clicking noises. Always check the specific manufacturer manual for exact tolerances.
Ask an ExpertLuxury Vinyl
What is the recommended subfloor flatness tolerance?
The standard subfloor flatness tolerance for luxury vinyl is typically 3/16 inch over a 10-foot radius. Any deviations greater than this require leveling compounds or grinding to prevent damage to the locking mechanisms of the planks.