Crushed Rock vs. Round Rock: Which One’s Right for Your Project?
Gravel comes in many shapes and sizes, but two types cover most landscaping needs: crushed rock and round rock. Each performs differently depending on where and how you use it.
Here’s a simple breakdown to help you choose the right material for your project.
What Is Crushed Rock?
Crushed rock is made by breaking larger stones down into smaller, angular pieces. These rough edges help the material compact tightly and stay in place.
Common uses:
- Driveways
- Pathways
- Base for patios or pavers
- Drainage trenches
Key features:
- Angular shape locks together
- Creates a firm surface
- Resists shifting under weight
- Often includes "fines" (dust) that help with compaction
We carry options like 20mm road crush and crushed gravel blends that are ideal for compacted bases.
What Is Round Rock?
Round rock (also called river rock or pea gravel, depending on size) is naturally smooth. It's formed by water over time, which wears down the edges.
Common uses:
- Decorative borders
- Garden beds
- Drainage
-
Play areas or dog runs
Key features:
- Smooth to the touch
- Doesn’t compact as well
- Rolls underfoot or tires
- Drains freely
We offer pea gravel and 20mm and 40mm round rock, great for visual appeal and water movement.
Crushed Rock: When to Use It
Choose crushed rock when:
- You need a stable base for hardscaping
- You’re building a driveway or path
- You need to level a surface
- You’re prepping for pavers or concrete
The compacted surface holds up well under traffic and weight.
Round Rock: When to Use It
Choose round rock when:
- You want a decorative finish in flower beds
- You need drainage around foundations or downspouts
- You’re creating low-traffic paths
- You want a softer look than crushed gravel
It’s low-maintenance and blends naturally into outdoor spaces.
Can You Mix the Two?
Not in the same layer—but you can use both in the same project. For example:
- Crushed rock for the base
- Round rock on top as a decorative layer
This gives you stability plus a finished look.
Final Tip
Use crushed rock when performance matters. Use round rock when appearance and drainage are your focus.
Still unsure? Tell us where you're using it. We’ll help you match the right gravel to your job. Our materials come in ½ yard and 1-yard bags, with free delivery in Calgary.