Armour stone and manufactured concrete retaining wall blocks can both be used to create attractive, functional retaining walls. However, they differ in appearance, size, installation requirements, and design flexibility.
Armour stone uses large, naturally quarried pieces with individual textures and shapes. Concrete retaining wall blocks are manufactured for more consistent dimensions and finishes. The better choice depends on your property’s layout, the appearance you prefer, and the wall’s structural requirements.
What Makes These Materials Different?
The biggest difference is how the materials are produced. Armour stone is quarried from natural rock. Each piece has variations in size, colour, and texture, giving the finished wall a distinctive appearance.
Concrete retaining wall blocks are manufactured in controlled shapes and sizes. Depending on the product, they may have smooth, textured, or stone-like finishes.
Neither material is automatically better for every retaining wall. The intended use and site conditions should guide the selection.
Appearance: Natural vs. Uniform
Armour Stone
Armour stone creates a substantial, natural appearance. Its irregular surfaces and varied tones often complement rural properties, established gardens, and landscapes featuring natural stone.
The finished wall has an individual character because no two pieces are exactly alike. Carlsbad Paving provides armour stone installation in Ottawa for retaining walls, garden borders, steps, and landscape features.
Concrete Retaining Wall Blocks
Manufactured blocks offer greater visual consistency. Their regular dimensions can create defined lines, repeating patterns, and a more structured appearance. They are often selected for formal landscapes or designs where a consistent colour and finish are important. Some manufactured products imitate natural stone, but their uniform sizing produces a different overall effect from large quarried pieces.
Design Flexibility and Property Style
The right material should complement your home and surrounding landscape. Armour stone often suits properties where the retaining wall is intended to look like part of the natural terrain.
Large stone pieces can create a strong visual feature, particularly on sloped or spacious properties. Manufactured retaining wall blocks may be better suited to designs emphasizing repeated shapes, clean lines, or coordinated architectural finishes.
If your landscape already includes interlock paving, consider whether you prefer a matching, structured appearance or the contrast of natural stone. A coordinated hardscaping design can help retaining walls, patios, steps, and garden borders look like parts of the same property.
Installation Access and Equipment
Access can influence which materials are practical for a particular site.
Armour Stone
Large quarried stones are heavy and typically require mechanical equipment for lifting and placement. This can make access particularly important on properties with narrow side yards, limited working space, or existing structures close to the installation area. Stone selection and placement also involve accommodating variations in individual pieces.
Concrete Blocks
Manufactured retaining wall blocks are available in various sizes, including systems with smaller individual units. Some products can be handled with less substantial equipment, although larger blocks and structural systems may still require machinery.
Installation requirements depend on the chosen product, wall design, and site conditions. Neither material should be selected based on accessibility alone when the wall has important structural responsibilities.
Durability and Maintenance
Both materials can provide long-lasting retaining structures when properly specified and installed. Armour stone is naturally durable, but the wall’s stability depends on appropriate construction and drainage rather than stone strength alone.
Manufactured concrete blocks can also perform well when the correct system is selected and installed according to its requirements. Over time, homeowners should watch for signs of movement, drainage problems, or changes in the surrounding ground. Visible leaning, bulging, or separation should be professionally assessed, regardless of the material.
How Does Wall Height Affect Your Choice?
Wall height and the amount of soil being retained can influence the suitability of either material. A small decorative garden wall has different requirements from a structure holding back substantial ground or supporting nearby loads.
Some retaining walls require engineered design, reinforcement, or permits depending on their location, dimensions, and site conditions. Armour stone and manufactured blocks both have appropriate applications, but neither should be chosen for a structural wall solely because of appearance. For a broader explanation of when retaining structures may be necessary, see our guide to armour stone retaining walls.
Which Option Suits Your Property?
A few practical considerations can help narrow the decision.
| Consideration | Armour Stone | Concrete Retaining Wall Blocks |
|---|---|---|
| Appearance | Natural, varied, substantial | Consistent, structured |
| Colour and texture | Natural variation | Product-specific selections |
| Piece dimensions | Large, often irregular stones | More standardized units |
| Design character | Organic and rugged | Formal or contemporary |
| Equipment needs | Usually mechanical handling | Depends on block size and system |
| Structural suitability | Requires site-appropriate design | Requires system-appropriate design |
The best option depends on how the wall will function, the available space, and the visual character of the property.
For homeowners planning multiple outdoor improvements, coordinating the retaining wall with residential landscaping can help ensure the surrounding surfaces, access routes, and landscape features work together.
Choose a Retaining Wall That Fits Your Landscape
Armour stone offers natural variation and a bold appearance, while manufactured concrete retaining wall blocks offer consistency and a range of structured design options. Both require appropriate site assessment and construction. The right material is the one that meets the property’s needs while complementing the surrounding landscape.
Carlsbad Paving has served Ottawa and surrounding communities since 1959, providing natural stone and armour stone installations for residential properties.
Considering an armour stone retaining wall or natural stone landscape feature? Contact Carlsbad Paving for a free consultation, or call 613 822-0225 to discuss your project.
