Retaining walls are built in a specific way based on the lay of the land. The most common walls are made from wood or masonry that is placed at a right angle to the ground's downward slope. The materials are positioned for natural hillside is held in place. Basically, the wall is sloped backwards towards the hill it is intended to hold. After installation, a retaining wall keeps uphill debris, dirt and rocks from sliding downward.
Rebuilding and adding retaining wall should be done under the advice of a contractor specially if the wall must be hold up under the tons of soil or water weight. Proper build retaining walls can last for decades.
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