A retaining wall made from boulders is a less expensive alternative to fencing. To build one, you need just a few materials and a small amount of time. The sturdiness of boulders allows the wall to withstand harsh weather, lasting for years.
You will need:
Step 1: Determine where the new wall will be located and mark the sides, back, and front on the ground with the shovel.
Step 2: Use the hammer to drive the long wooden stakes into the ground at each corner spot for the wall. If there is more than an eight-foot distance between the corners, drive in additional stakes so the distance between stakes does not exceed eight feet.
Step 3: Determine the height of the wall. Take one piece of string and tied one end onto a corner stake, attaching the string at your desired height. Work your way around the wall, stretching the string and tying it to each of the wooden stakes. Use your string level to verify that the string height is level and consistent from one stake to the next.
Step 4: Use the shovel to dig a trench eight inches deep around the entire base of the future wall. Add gravel approximately three inches deep and use the rake to level the gravel.
Step 5: Begin at the string marking the front section of the fence. Place boulders in the trench, putting the largest ones in along the ground. Position the boulders as closely as possible to each other. Backfill gaps with the gravel to secure the boulders.
Step 6: Place the second largest boulders in the next row. To make the wall stronger, angle these slightly to the back of the wall. The second row of boulders should rest on the joints of the first row.
Step 7: Continue making additional rows, using the largest rocks available for each row. Stop when the desired height is reached and use the gravel to backfill behind the wall.