Step 1 Lay Out the Patio
Lay out the outline of the patio with batter boards and mason’s line. Check that your layout lines are level using either a water level or a line level, and drive the batterboards father in as needed. Make sure the corners are square using the 3-4-5 triangle method: Mark a point 3 feet from the corner on one line and another point 4 feet from the corner on the other line. If the distance between the points is 5 feet, the corner is square. If not, make the necessary adjustments. Repeat for each corner. Measure the diagonals of the patio. If the corners are square, the diagonals will be equal. If not, use a framing square to see which corner is out of square; correct it and repeat set 2 and this step.