All retaining walls should lean into the hill 1 inch for every 12 inches of height. Timber walls 4 feet or higher should be tied to the hillside with "deadmen" anchors (6-foot-long, T-shaped tiebacks buried in the hillside) attached to the wall every 8 feet, extending 6 feet back to a 2-foot-wide T-bar.
Why is my retaining wall leaning?
Pressure from the soil behind retaining walls may cause them to tilt or lean. Older retaining walls tend to be more prone to leaning than newer ones because “Mother Nature” and age works their magic over time. Walls that are not constructed or engineered properly also tend to tilt over time.
What to do if retaining wall is leaning?
Whether a retaining wall is built of stone, block, concrete or wood, it can begin to lean. When this occurs, the homeowner has two choices: either demolish the wall, re-excavate, re-install drains and rebuild, or call in a foundation repair specialist.