How To Build Retaining Walls

Retaining walls are built to support sloping terrain and provide flat areas for planting on an otherwise downward slope. They are great for landscaping projects, such as creating terraces for a garden. Building your own retaining wall, instead of hiring a builder, can save money, but there are a few things to consider first.

Types of retaining walls

Choose the type of retaining wall needed by assessing space, type of soil and budget. Gravity retaining walls, one of the most common types, depend on their heavy weight to hold back the ground pressure, and usually do not require mortar for stacking. Cantilevered walls, which typically incorporate steel-enforced beams, require less building materials, making them cost-efficient. Piling walls are constructed from of a variety of materials, including wood and steel planks. These planks are driven deep into the ground, making them a good choice for soft soils.

Drainage systems

Unless using a drystone for construction, include a drainage system for the retaining wall. Omitting a way for the water to drain, may cause it to build up and dislodge the retaining wall.

Steps for building

After choosing a site, dig a trench deep enough and wide enough for the materials and type of retaining wall. A general rule of thumb is to dig the trench 1'' for every 6-8'' of wall height. Tamp the soil down until firm, to create a flat surface to lay the construction materials on. If building a gravity wall, place the blocks side-by-side and take the time to ensure that they are equally level. Using back-fill between each layer of blocks, continue to stack the blocks until the desired height is reached. Cap the top layer of blocks to finish.

Building a retaining wall can save money, but it is important to complete the project safely. If the wall is higher than 4 feet, consult a professional builder and always have help available when lifting heavy blocks.

Building your own retaining wall instead of hiring a builder can save money