Wood retaining wall construction

Are wood retaining walls good?

Wood retaining walls provide structure, stability, and natural beauty to gardens and landscaping projects. They continue to be a popular choice because of the natural look they provide and because of their low price point, relative to expensive masonry and concrete retaining walls .

What kind of wood should I use for a retaining wall?

The best kind of lumber for these walls is Douglas fir pressure treated with preservatives to discourage rot. It will be green or brown in color and rated for earth-to-wood contact. For timber walls, large timbers for can be very expensive, which is why railroad ties are a common alternative.

How high can you build a wood retaining wall?

Your walls can be as long as you want, but limit the height to 4 ft . Add more terraces as needed to retain higher slopes, stepping them back about 4 ft .

What is the cheapest retaining wall to build?

What is the cheapest retaining wall material? Treated pine and is the least expensive material. Hardwood is more expensive than treated pine. Railway sleepers are another – slightly more expensive – option and are built to withstand ground and water contact. Concrete sleepers are more expensive.

What is the easiest retaining wall to build?

For the average do-it-yourselfer, building a retaining wall is easiest when using masonry blocks that will be stacked no taller than three feet, with no mortar binding the stones or concrete members. (For a curved wall , mark instead with a garden hose or spray paint.)

Do I need drainage behind retaining wall?

Although there are exceptions, most retaining walls require gravel backfill, soil compaction, pipe or toe drains , and weep holes. Together, these four features will provide adequate drainage for most designs. Only a few types of walls will not require all of them.

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How long do wooden retaining walls last?

40 years

Do you need a footing for a retaining wall?

A buried structural footing is usually required for larger retaining walls . To create this, a landscaper pours concrete below frost level (the depth to which the ground will freeze during the winter). Footings poured too shallow are prone to shifting and moving if moisture in the soil freezes and heaves.

How do you build a wood retaining wall on a sloped yard?

How to Build a Wood Retaining Wall Step 1: Remove Soil and Dig a Trench. Step 2: Prepare the Timbers. Step 3: Drive Rebar Stakes. Step 4: Drill Holes for Spikes. Step 5: Lay the Drainpipe. Step 6: Put the Deadmen and Tiebacks in Place. Step 7: Lay the Remaining Courses. Step 8: Fill With Topsoil.

How much does it cost to build a wooden retaining wall?

Timber retaining wall cost depends on the type of timber being used. Professional installation of a softwood timber retaining wall such as treated pine can cost $250 to $350 per square metre, while a hardwood timber sleeper retaining wall can cost $550 to $700.

How high can I build a sleeper retaining wall?

You can build retaining walls as high as 4.2 metres with the correct engineering and permits. Most domestic retaining walls are below 2 meters, if you would like assistance in this area talk to your landscaper, local council or give us a call on 9761 7123.

What is the strongest type of retaining wall?


How deep should the footing be for a retaining wall?

The depth of the trench should be equal to the height of the block plus compacted base depth (Table 1). Example: For an exposed wall height of 1’6″ and using a 6″ high block, dig the trench a total of 9 inches in depth .

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What slope requires a retaining wall?

The wall should lean into the hill at a minimum of 1 inch for every 12 inches of height in order to maintain a safe load on the wall . This can also help with the drainage when the soil becomes saturated.