The answer to 'frequency of retaining wall' is that most retaining walls should be inspected and maintained annually. Retaining walls are designed to hold back soil and prevent erosion, but over time they can become damaged or unstable due to factors like weather, settling, and improper installation.
It's generally recommended to have a professional landscaper or structural engineer inspect your retaining wall once a year to check for any cracks, leaning, or other issues. This allows you to catch problems early before they become major repairs. Depending on the condition of your wall, you may need to make minor fixes like repairing cracks or replacing loose stones. In some cases, more significant reconstruction or replacement may be required if the wall has significant damage or is no longer structurally sound.