How To Build A Block Wall On A Slope. I decided to build a retaining wall on the property line, and … i had an area on the side of my house that was a narrow path of flagstones and sloped down toward my neighbor's house. Many of the landscape blocks have a lip on their back that connects with the block below when you stack the mark where you plan to build the front of the sloping wall with a string tied to a pair of stakes.
Instead, we had to set concrete buried post.
A yard with a steep slope can be difficult to landscape. Start the concrete footing by digging the area of the wall a few inches below the frost line, the maximum depth. If your property slopes, you may have to dig your foundation trench in a series of steps equal to the height of the blocks. Insert wood stakes to mark the boundaries of the first retaining wall at the base of the slope.