The Ultimate Guide to Choosing Retaining Wall Blocks in St. Louis

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Building a retaining wall can be a fantastic way to add beauty, functionality, and even extra usable space to your landscape. But before you get started, one crucial decision needs to be made: choosing the right retaining wall blocks. With a variety of materials, sizes, and styles available, selecting the perfect blocks can feel overwhelming. Fear not! This comprehensive guide will equip you with all the knowledge you need to make an informed choice.

A World of Blocks: Exploring Different Types

Retaining wall blocks come in a surprising variety, each offering unique advantages and aesthetics. Here’s a breakdown of the most common types:

Concrete Retaining Wall Blocks

These versatile workhorses are the most popular choice for their durability, affordability, and ease of installation. They come in a wide range of colors, textures, and finishes to complement any style.

Concrete Retaining Wall Blocks in St. Louis

Interlocking Retaining Wall Blocks

As the name suggests, these blocks feature interlocking mechanisms that allow for fast and easy installation, even for curved walls. They’re a great option for DIY projects and offer a clean, finished look.


As the name suggests, these blocks feature interlocking mechanisms that allow for fast and easy installation, even for curved walls. They’re a great option for DIY projects and offer a clean, finished look.

Interlocking Retaining Wall Blocks in St. Louis

Segmental Retaining Wall Blocks

These blocks are known for their exceptional aesthetic appeal. They often mimic the look of natural stone or brick, creating a sophisticated and elegant retaining wall. Segmental retaining wall blocks come in a wide variety of shapes, sizes, and colors, allowing for a high degree of design flexibility.

Gravity Retaining Wall Blocks

These heavyweights rely on their own weight for stability, making them ideal for larger retaining walls. They’re typically not designed for intricate curves but provide a robust and functional solution for significant height changes.

Keystone Blocks

These distinctive wedge-shaped blocks are specifically designed for building curved retaining walls. They interlock seamlessly with standard retaining wall blocks, creating a visually appealing and structurally sound curved wall.

Keystone Retaining Wall Blocks in St. Louis

Beyond these common types, several other options exist, including Versa Lok blocks and redi rock blocks, which offer similar benefits and functionalities.

Pros and Cons of Block Materials

While concrete is the most popular material for retaining wall blocks, it’s not the only option. Here’s a quick look at the advantages and disadvantages of different materials:


Affordable, durable, versatile, easy to install. Can appear less natural compared to other materials.


Beautiful, natural look, very durable. More expensive than concrete, requires skilled installation.


Classic and timeless aesthetic, complements traditional homes. Can be more susceptible to cracking compared to concrete.

Manufactured Stone Veneer

Offers the natural look of stone at a lower cost than real stone. May not be as durable as natural stone.

Choosing the Perfect Block: Factors to Consider

Now that you’re familiar with the various block types and materials, let’s delve into the critical factors to consider when making your choice:


Wall Height

The size of the blocks you choose will significantly impact the maximum achievable height of your retaining wall. Taller walls typically require larger, heavier blocks for stability.

Project Scale

For smaller retaining walls or raised garden beds, smaller blocks might be more manageable and aesthetically pleasing.


As mentioned earlier, weight plays a crucial role in wall stability. Heavier blocks are better suited for taller walls or walls holding back significant amounts of soil.


Do you envision a clean, modern look? Or perhaps a natural, rustic aesthetic? The style of your chosen blocks will significantly influence the overall look and feel of your retaining wall. Consider stacked, curved, tiered, or angled styles to achieve your desired design.


Weigh the pros and cons of different materials like concrete, stone, or brick based on your budget, desired aesthetics, and project requirements.

Choosing the Right Block: It’s All About Balance

Ultimately, the best retaining wall block for your project is the one that strikes a perfect balance between functionality and aesthetics. Consider the following:

Wall Height and Purpose

The height and purpose of your retaining wall will dictate the size and weight requirements for the blocks.

Desired Look

Do you prioritize a modern, sleek look or a natural, rustic aesthetic? Choose blocks that complement your overall landscape design.
Budget: Concrete blocks are typically the most affordable option, while natural stone can be significantly more expensive. Choose a material that fits your budget without compromising on functionality.

DIY vs. Professional Installation

If you’re planning a DIY project, consider the ease of installation of different block types. Interlocking retaining wall blocks are generally considered the most DIY-friendly option due to their simple connection mechanisms. These blocks often click or snap together without requiring complex techniques or specialized tools.
Segmental retaining wall blocks can also be suitable for DIY projects, especially with readily available instructional materials and online tutorials. However, their intricate shapes and potential for intricate designs might require more planning and attention to detail compared to interlocking blocks.

Gravity retaining wall blocks, due to their significant weight and reliance on proper placement for stability, are generally better suited for professional installation. Building a safe and structurally sound retaining wall with gravity blocks often requires experience with handling heavy materials and ensuring proper base preparation and leveling.

Additional Considerations for DIY Installation:

Project Complexity

While interlocking blocks simplify installation, the overall complexity of your retaining wall project should also be factored in. Straight, low-rise walls are generally easier to tackle as a DIY project compared to curved walls or walls with significant height changes.
Your Skills and Experience: Be honest with yourself about your DIY skills and experience. If you’re comfortable with home improvement projects and have a good understanding of basic construction principles, you might be well-equipped for a DIY retaining wall project using interlocking blocks.

Tools and Equipment

Building a retaining wall often requires specific tools and equipment, such as a level, tamper, plate compactor, and possibly a concrete mixer depending on your chosen blocks and base material. Factor in the cost of renting or purchasing these tools before embarking on a DIY project.

The Importance of Visuals

Remember, a picture is worth a thousand words. When choosing your retaining wall blocks, look for visual aids from manufacturers or retailers. These can include installation guides with step-by-step instructions and diagrams, showcasing the ease of use for interlocking blocks or the potential complexity of intricate segmental block designs. Additionally, online resources and tutorials can provide valuable insights into the DIY feasibility of your retaining wall project based on the chosen block type.

By carefully considering the factors mentioned above, you can make an informed decision about whether to tackle your retaining wall project as a DIY endeavor or enlist the help of a professional. Remember, safety is paramount. If you’re unsure about your ability to handle the project safely or achieve the desired results, consulting with a qualified retaining wall contractor is always a wise decision.

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