Retaining wall blocks

Step 1: Determine the Number of Blocks Required

Use the tape measure to determine the length of your wall. Then divide this number by the length of each block you plan to use for your project. In this way, you'll probably know how many blocks you need to use per row. And to determine how many rows are in your own project, divide the length of your wall by the height of the block.

Step 2: Prepare a Good Foundation
Only when your retaining wall has a strong foundation system, your project will maintain its longevity. Dig the trench where you plan to install the wall with at least 4 inches in depth and 24 inches in width. For the sloped area, you'll want to level the trench to have space for keeping the stone blocks. For the stacked-block retaining walls, provide an area of at least 4 inches for adding the crushed rock behind the wall to keep it settle.

Step 3: Tamp Down the Paver Base
Use a hand tamper to tamp down the paver base which you added into the trench. Tamp it until it's below the tops of the stakes about 1 inch. Then, use a garden hose and spray the paver base down to compact it into the soil.

Step 4: Start to Build a Retaining Wall
When you've already prepared a good foundation for the construction job, you can come to the most important part to get an end result of this project: build up the retaining wall structures.
Here is some information for your reference, if you have any questions, please contact GREEN ARBOR LANDSCAPING (206) 265-2940 for advice.