As the economy strengthens, we are seeing increased tile sizes and diverse types of tile flowing into the US market. Each of these products has different requirements in order to achieve suitable mortar coverage.
In order to meet the ANSI A108 requirement for mortar coverage (80% in dry areas and 95% in wet and exterior areas), it is extremely important to select the trowel notch that provides the appropriate amount of mortar to properly bond the tile to the substrate.