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 ...

Richard shows how to maintain a mini split; Mark and Jenn build a garden retaining wall. Richard Trethewey demonstrates how to maintain a mini split, showing how to properly clean the indoor and ...