How To Build A Rock Wall On A Slope. Use wood stakes and a mason s line to mark the location of the front face of the base of the wall. A retaining wall is used to prevent a hill from eroding or to create a flat surface for a garden or flower bed.
Layout the concrete stones that will be used where the wall will be built. The trench should be 12 inches deep. Use wood stakes and a mason s line to mark the location of the front face of the base of the wall.
If you are building a straight wall tie a string.
Multiply the length by. A drainage pipe is lowered down the slope where it gets rid of the water. To build these retaining walls and place the rock you ll need to cut into the slope and create a level ground above and below the wall. Mark the front edge of where you plan to build the wall.