The size of the notched trowel for a 12x24 floor tile can vary depending on the specific needs of the tile and the substrate. However, a commonly recommended size for a 12x24 tile is a 1/2-inch notched trowel.
The size of the notches on the trowel determines the amount of mortar or adhesive that is applied to the substrate. A 1/2-inch notched trowel means that the notches on the trowel will be approximately 1/2 inch in depth and width, leaving a consistent layer of mortar or adhesive on the substrate when the tile is pressed into place.
It's important to note that the size of the trowel may vary depending on factors such as the type of tile, the type of adhesive being used, and the condition of the substrate. It's always a good idea to consult the manufacturer's instructions for the specific tile and adhesive being used to ensure the correct trowel size is selected. Additionally, following industry best practices and consulting with a professional tile installer can help ensure a successful installation.