To build a rock wall, add layers of landscape fabric and landscape stones in a trench, and build the wall on top of the base using rocks and mortar. Use masonry string line tied between two stakes to ensure each layer is level.Continue Reading
Determine how wide you want the wall to be. Dig a trench that is 2 feet wider than that width and deeper than the frost line of your area.
Lay landscape fabric along the bottom of the trench, and overlap the seams by 12 inches.
Pour 3/4-inch thick stones over the landscape fabric, and tamp the stones until their height reaches 6 inches. Repeat until the height of the stones is 8 inches below the grade.
Determine where the ends of each straight wall are. Insert a stake 12 inches away from the end of each wall and on each side so there are four stakes around each wall. Connect a string between each pair of stakes so the string rests just a little higher than the grade.
Set down the first rock at one corner of the trench, and ensure it grazes the string. Set down the next rock against the first, and ensure it touches the string as well. Continue until the first row is finished, and repeat along the other string.
Use smaller rocks to fill the gap between the first two rows. Stack the rocks until they are level with the tops of the first rocks.
Lay a flat layer of mortar on top of the first row of rocks.
Move the string up on the stakes. Spread fresh mortar on the rocks with a trowel, and lay a rock on top of it. Tamp the rock with a mallet, and continue until the second row is finished. Scrape away excess mortar.
Add more layers until the wall reaches the desired height.
Use a brick jointer to apply and smooth mortar in the gaps between rocks.