Size the trench so there's enough room for the retaining wall block and at least 8 in. of space behind it. Excavate deep enough to completely bury at least one full course, including space for 6 to 8 ...

There's a lot to love about a stackable retaining wall in your backyard. If your yard has an uneven slope, a retaining wall can add usable space to your outdoor areas and increase the value of your ...