Surface moisture content test
The base layer should be dry. When the moisture content of the base layer is between 4% and 8%, or when the moisture content of the base layer with floor heating is between 2% and 8%, measures should be taken to strengthen ventilation and wait for drying or to apply a water-free and solvent-free epoxy moisture-proof isolation layer. When the moisture content of the base layer is greater than 8%, construction should wait until it is dry enough to meet the requirements.