Q. I’ve seen quite a few failed retaining walls. Many have bulges or have tipped over. What needs to be done to ensure I only do mine one time? I’ve seen photos of walls hundreds of years old that ...

When these systems are properly designed, built and maintained, they often last many decades.

Lowe Larretta is former lead editor for Forbes Home, covering all things related to home improvement and good design. She previously worked in the decor and lifestyle spaces for digital publishers ...