Mark Grid Lines for Squares

What happens here

After finding the wall's center, begin marking the 12-inch grid. First, from the ceiling down, mark 12-inch increments along the central vertical line using the tape measure and pencil. Next, considering the wainscoting (if present, as in the video, where it's 36 inches plus 2.5 inches for the baseboard), determine the lowest point where the squares will stop. This prevents squares from overlapping with existing trim. Then, starting from the center and working outwards, mark 12-inch increments horizontally across the wall. Use the long level to draw straight horizontal lines connecting these marks, creating a complete grid of 12x12 inch squares. Mark every other square lightly with a pencil to indicate which ones will be painted.

Goal: Establish a 12x12 inch grid pattern on the wall.