Olympic Landscaping Construction provides Retaining walls San Francisco and has expertise in everything from masonry, woodwork, and lawn maintenance to water features, lighting, and plant installations. Older site retaining walls usually start to sink over time. They often don’t have deep or wide footings, appropriate long-term drainage, or both. Particularly when there is a nearby slope, vegetation, and irrigation, moisture in the soil typically causes pressure behind the wall. Site walls are the name for walls in the yard. If these new walls are constructed properly with reinforced concrete, solid footings or piers, and drainage behind them to relieve any potential water pressure, they will stand the test of time.