![]() DON’T forget to check with the authorities.Ī retaining wall’s effect on the natural flow of water could impact your neighbors, so some communities require homeowners to obtain a permit before construction commences. Does that sound like you? If you’re looking to get your hands dirty and enhance your landscape with a retaining wall, these guidelines for building a retaining wall will help you get off to a good start. Shorter retaining walls, however, can be constructed by enthusiastic do-it-yourselfers equipped with some basic construction knowledge. For just this reason, retaining walls taller than four feet should be designed and constructed by the pros. Miscalculate your construction plans, and you could end up with a weak wall that risks bulging or, worse, collapsing altogether. With every additional foot of height, the pressure of the soil increases substantially. Soil is heavy, especially when soaking wet from a recent rainstorm, so a basic retaining wall (four feet tall and 15 feet long) potentially has to support up to 20 tons of soil pressure. Despite their simple appearance, though, these walls require a good deal of planning-sometimes professional engineering-to keep their shape.
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