Retaining wall cost varies by material.
Retaining wall base calculator.
Retaining wall base trench.
600 mm wide the length of the wall the depth of the trench will be 6 in.
Length of the wall in inches x depth of a block in inches x 2 x required depth of the base material in inches required depth of the base material in inches x 0 20 1728 cubic feet of base material.
Follow the block manufacturer s instructions for wall height limits.
The interlocking retaining wall block can be used to build walls up to 24 to 36 inches high depending on the size of the block.
Before building a retaining wall plan it out.
Interlocking concrete blocks are beautiful and designed and structured specifically for use in retaining walls.
Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding.
A retaining wall must have the strength to hold back the weight of the soil plants and sometimes small structures behind it.
The calculation below factors in compaction.
Our easy to use professional retaining wall block calculator was designed to help you estimate precisely how many anchor wall blocks and complementary materials you will need for your next project.
Using a tape measure decide the length and the width of your retaining wall then mark off the area with the garden stakes and string.
Avoid placing the retaining wall where downspouts are pointed to keep standing water from forming inside the wall.
The retaining wall should be set embedded below grade on a level base of 6 gravel or stone.
See our retaining wall cost guide to find the average price of a retaining wall.
When building a retaining wall diy landscapers need accurate estimates on the amount of stone blocks cap stones and gravel needed to complete the project.
150 mm plus an additional 1 in.
The wall gets its strength from a sturdy base consisting of gravel.
This professional estimator tool can be used to create multiple projects all of which can be edited and updated if circumstances change.
Poured concrete is typically the most expensive followed by wood timber and then stones and pavers.
The success of your retaining wall depends on a level base.
25 mm for each 1 ft 300 mm of wall height for the amount or buried block that is needed.
More information on retaining walls where the base trench steps up a slope.
We recommend making the base twice as wide as the block depth to account for settling.
Planning a retaining wall.
Preparing the retaining wall base.
To create a solid foundation dig a trench for the first course of your interlocking retaining wall blocks to sit in and make sure the ground remains even throughout.
Dig a base trench 24 in.