The answer to 'types of retaining wall' is that there are several common types of retaining walls used in landscaping projects. The most popular options include concrete block retaining walls, poured concrete retaining walls, stone or brick retaining walls, and timber or railroad tie retaining walls. Each type has its own unique advantages in terms of durability, appearance, cost, and installation requirements.
Concrete block retaining walls are a very common and affordable option, made from interlocking concrete blocks that are stacked to create the wall. Poured concrete walls are a more solid, permanent solution that can be customized in shape and size. Stone or brick retaining walls offer a natural, rustic look and are highly durable. Timber or railroad tie walls are a classic choice, providing a rustic aesthetic at a lower cost.