When building a brick path, use edging to keep it in place.
Commercial brick edging is a quick and easy way to form a stable edge for a brick pathway. Note: This is not the same as lawn edging, which only keeps plants in check.
1. Create the base. Strip out soil 4 to 10 inches deep; lay down a few inches of rock and then a couple inches of sand.
2. Add the edging. Anchor the edging atop the sand.
3. Lay the bricks. Position the first row of bricks against the edging.
4. Finish. Nail down the outer edging as you lay the last row of bricks.