Retaining Wall Underpinning Before and After – Adelaide Structural Reinforcement Retaining walls can gradually weaken over time due to soil movement, drainage issues, erosion, tree roots, or aging foundations. On this project, we were called in to strengthen and underpin an existing retaining wall showing signs of instability and foundation movement. This wasn’t a cosmetic repair — the goal was to properly reinforce the structure and provide long-term stability. Step 1 – Exca