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 ...

Dear James: I’m planning a veggie garden on my sloping lot so I need a retaining wall. I have used timbers before, but blocks might hold up better. Which method do you prefer? -- Steve W. Dear Steve: ...

A good retaining wall is an unlikely combination of designs–basically a strong wall full of holes. It has to be strong enough to hold back earth that can exert tremendous pushing force. It also has to ...