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Skip trowel texture is a finishing technique used to add a decorative appeal to walls and ceilings. It serves as a compromise between the smoothness of standard drywall and the bumpy texture of a popcorn or orange peel finish.
1 Your trowel size will depend on the size and type of tile you're using. For the average small wall tiles which are currently popular, you will want to use a 1x4 square notch trowel.  Test a tile to make sure the mortar is mixed and spread correctly. Mortar a small spot and then place a tile. Pull the tile up and look at the pattern that is create on the back. If you see clear lines, then the mortar is too dry.