Before installation, the subfloor must be tested using a calibrated moisture meter or a concrete moisture test kit. For concrete slabs, the relative humidity (RH) test is common, often requiring levels below 75-80% depending on the specific flooring product. If moisture exceeds recommended limits, the installation must be delayed until a concrete sealer or vapor barrier is applied, preventing damage to the flooring's locking system or subfloor.
Ask an ExpertLuxury Vinyl
How are substrate moisture levels validated before installing luxury vinyl flooring?
Moisture levels are validated using specialized hygrometers or calcium chloride tests to determine moisture vapor emission rates. Professional installers measure the relative humidity and concrete moisture content to ensure they fall within the specific manufacturer’s thresholds.