Making an outside corner with retaining wall blocks can be a great way to add structure and stability to your outdoor space. Retaining wall blocks are specifically designed for use in landscaping projects, such as creating raised flower beds or other landscape structures. These blocks come in different sizes and colors, making them perfect for creating various styles and looks.

With the right tools and materials, you can easily create a corner out of retaining wall blocks that will look great in your yard. Using retaining wall blocks to create an outside corner for your outdoor space can be a great way to make the most of your landscaping.
Retaining wall blocks are durable and easy to install, making them a popular choice for corners in yards or gardens. You can find step-by-step instructions on how to make a outside corner with retaining wall blocks in this blog article.
Materials You Will Need
- Retaining wall blocks
- Level
- A shovel or other digging tool
- Plastic edging (optional)
- Sand, crushed stone, or gravel (optional)
- Mortar
- Storage containers
How Do You Calculate the Amount of Material Needed for the Retaining Wall?
When calculating the amount of material needed for a retaining wall, you will need to consider both the length and height of the wall. Additionally, it is important to factor in any curves or turns that may be present, as they can significantly increase the amount of material required.
To determine how much block and mortar is needed, you should first measure the total length of the wall and then multiply this by the height of the wall. This will give you a total volume that should be used to estimate how much block and mortar is needed for your project.
Once you have determined how much block and mortar are required, it’s time to calculate the amount of material needed for an outside corner. This is done by measuring the length and width of the corner and then multiplying this by the depth of the wall. This will give you an idea of how many blocks are needed for that particular section.

Additionally, it’s important to factor in any curves or turns as they can significantly increase the amount of material required. Finally, you should add in the amount of mortar needed for the corner and for any additional blocks used.
Step-by-step Instructions for How to Make a Outside Corner With Retaining Wall Blocks
Step 1: Inspect the Area
Locate any underground utilities that may be in the area to avoid them. Check for slope by using a level and check if there are property lines or another wall nearby. Measure from one corner of the existing retaining wall to the other and mark with spray paint.
Step 2: Dig Out the Dirt
Dig up the ground around the perimeter of the marked area to prepare for building a corner. Make sure to dig down at least 6 inches and throw away any excess soil. Rake the base of your excavation to make it even, then pack it down with a tamper.
Step 3: Lay Out the Gravel
Spread a 4-inch layer of gravel across the base of the excavation. Compact it with a tamper, then add another 2 inches. This will help to ensure that your corner is stable and level. Use a level to ensure the area is even and flat before building your corner. Make any necessary adjustments with the gravel to get it level.
Step 4: Place Your Cornerstone Block
Start by laying a corner block in the corner of where you plan to build the outside corner. Make sure this cornerstone block is level and secure it with landscape adhesive. Start laying the foundation by placing your second block to the side of the cornerstone block. Work your way in a spiral pattern, keep everything level, and secure each layer with landscape adhesive as you go. Continue until you reach the desired height for your corner.

Step 5: Place Your Capstones
Once you have reached the desired height, place your last layer of capstones on top. Make sure these stones are level and secure them with landscape adhesive. Backfill the area around your corner with soil to help support it. Compress the soil firmly using a tamper. Spread a layer of topsoil around the base of your corner and add mulch to the top to help keep it looking neat.
By following these steps, you can easily create a unique and attractive outdoor space that is both functional and aesthetically pleasing. Having an outside corner with retaining wall blocks adds dimension to any landscape design and is a great way to add value to your home.
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Precautions for How to Make a Outside Corner With Retaining Wall Blocks
- Always wear the proper safety gear when building a retaining wall. This includes goggles, gloves, and other protective clothing to protect you from any flying debris or dust.
- Make sure to check your local regulations before beginning your project. Some areas have specific requirements that need to be met before building a retaining wall.
- When digging out the area, be careful not to disrupt any underground utilities.
- Make sure the soil is compact and level when laying your foundation. This will help to ensure that your wall is stable and secure.
- Always use landscape adhesive to secure your blocks in place. This will help them stay put even during inclement weather or shifting soils.
- Build your corner carefully and take your time. It is important to ensure that everything is level and secure so your wall will be stable for years to come.
- Double-check measurements before beginning your project. This will ensure that everything is in the right place and the wall looks perfect when finished.
- If you are unsure about what retaining wall blocks to use, talk to a professional landscaper or contractor for advice. They can help recommend the best materials for your outdoor space.
- Make sure to add drainage holes to the base of your corner. This will help any water accumulating on the wall drain away and prevent erosion.

By following these steps and taking the necessary precautions, you can easily create a beautiful outdoor space with retaining wall blocks. With a little bit of patience and hard work, you’ll have an attractive corner that adds value to your home and landscape design.
How Often Should You Check Your Retaining Wall Corner for Wear and Tear?
When you build a retaining wall with corner blocks, it is important to check the integrity of your wall on a regular basis. Although some wear and tear are expected over time, if any damage occurs due to shifting soil or erosion, this should be addressed immediately. How often you need to check your retaining wall depends on the type of soil in which the wall was built and how much vertical pressure is put on the wall.
If your wall is in an area with high amounts of moisture, such as a wetland or near a lake or river bank, then you should check it at least once a year. During the check-up, make sure to look for any signs of cracking or shifting. If you notice anything, it’s best to contact a professional for further assessment.
In addition, if your wall is in an area with high wind or freezing temperatures, it should be checked at least every two years, as the weather can cause additional wear and tear. When checking your wall, look for any signs of bowing or leaning. As the soil beneath the wall can shift over time, it’s important to ensure that your corner blocks remain in place and stable.
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How Can You Extend the Life of Your Retaining Wall Corner Structure?
When building an outside corner with retaining wall blocks, your structure’s longevity is dependent on its base’s strength and stability. Taking additional steps to secure the foundation may help ensure that your structure will stand for many years to come.

One way to improve the long-term durability of a block retaining wall is by reinforcing it with steel mesh. This mesh should be placed between the blocks’ layers, creating an interlocking cage of support that will help keep the wall firmly upright. The steel mesh helps increase the wall’s structural integrity and can prevent displacement over time.
The compaction of soil is also important when it comes to constructing a retaining wall corner. It is important to allow for ample soil compaction at the base of your wall and throughout each course of blocks. This will help create a solid foundation for the structure, preventing it from shifting or collapsing over time.
Are There Any Maintenance or Repair Tasks You Should Do regularly?
When it comes to building a retaining wall corner with blocks, there are some regular maintenance tasks that should be done to keep the structure sturdy and looking great. Depending on your climate, you may need to check for erosion or shifting of the blocks and repair any damaged areas as needed.
You should also make sure that all of the connections between the blocks are securely fastened. Sealing the edges and joints of the blocks with a waterproof sealant is also recommended to help keep water out, which can cause further damage to the structure over time.
Finally, you should inspect the structure regularly for any signs of settling or cracking to prevent larger issues from arising in the future. Following these simple steps will help ensure your retaining wall corner is sturdy, attractive, and lasting for years to come.
Making an outside corner with blocks for a retaining wall is an easy and effective way to create a neat visual boundary in your yard or garden. Keeping up with regular maintenance tasks will ensure that your structure remains strong and looks great for years to come. With the right knowledge and a few simple tools, you can easily create an attractive and durable retaining wall corner with blocks.

How Much Will It Cost to Make an Outside Corner With Retaining Wall Blocks?
The cost of making an outside corner with retaining wall blocks depends on the size and complexity of the project. Generally, you can expect to pay between $7-$15 per block, depending on the type and quality of block you choose. For example, if you are using standard 6×6 blocks that cost around $8 each, then it may take around 20 blocks to make a corner which would cost around $160.
Furthermore, you will need the appropriate adhesive and tools to set the blocks properly. Depending on the products used, this can add up and range from $50 to $150. In addition to materials, there may be additional labor costs associated with making an outside corner with retaining wall blocks.
Depending on the job’s complexity, you may need to hire a professional to install them, which can add another $100-$400 to the total cost of your project.
Conclusion
The main disadvantage of using retaining wall blocks to create an outside corner is the time and effort it takes to install them correctly. As these blocks are made from various materials, they must be properly fitted together, or the wall will not be strong enough, leading to potential failure over time.
Also, since they are relatively heavy, you may need assistance to lift and set them properly. Additionally, these blocks must be sealed with a waterproof sealant for optimal protection from the elements. You may need specialized tools such as a trowel or level to ensure that your retaining wall is level and secure. All of this can add up to additional time and money spent on materials and labor.
Making an outside corner with retaining wall blocks is a great way to create stability and structure while also giving your yard a beautiful, finished look. This project can be completed in just a few steps, starting with measuring the dimensions of your desired corner and finding the right blocks for the job.

Next, you’ll need to cut any extra block pieces you need to fit the measurements of your corner, then mix and apply mortar to the blocks before assembling them in place. I hope reading this post has helped you learn how to make a outside corner with retaining wall blocks. Make sure the safety precautions are carried out in the order listed.