How to Use 20mm Road Crush in Driveways and Walkways

20mm Road Crush is one of the most reliable materials for building stable driveways, paths, and bases. It compacts tightly, drains well, and holds up under weight. Whether you're creating a new surface or reinforcing an old one, it’s a smart choice.

Here’s how to use it properly—from prep to finishing.

What Is 20mm Road Crush?

Road crush is a blend of:

•     Crushed gravel (up to 20mm in size)
•     “Fines” (gravel dust and small particles)

The fines fill the gaps between the gravel, helping it compact into a solid surface. Once packed, it won’t shift easily.

Where to Use It

•     Driveways (new builds or refreshes)
•     Walkways and garden paths
•     Base layer for pavers or concrete
•     Under sheds, pads, or patios

Step-by-Step: Installing 20mm Road Crush

1. Mark and Excavate

• Outline the area using stakes or spray paint.
• Dig down at least 4–6 inches for walkways, 6–10 inches for driveways.
• Remove all sod, roots, and soft soil.

2. Add Landscape Fabric (Optional)

• Helps prevent weeds and keeps the crush from mixing with the subsoil.
• Recommended for areas with soft or wet ground.

3. Spread the Road Crush

• Lay it down in 2–3 inch layers (called "lifts").
• Wet each layer slightly to reduce dust and help it settle.

4. Compact Each Layer

• Use a plate compactor for best results.
• Walkways may be compacted with a hand tamper, but heavier equipment works better.
• Compacting in lifts gives a firmer base and reduces sinking over time.

5. Slope for Drainage

• For driveways or paths near buildings, slope the surface away from structures—a 2% grade is ideal.

6. Top Off if Needed

• After settling, you may need to add another thin layer and compact again.
• Optional: Add a decorative top layer (e.g., pea gravel or rundle) for appearance.

Maintenance Tips

• Re-compact yearly if used in high-traffic areas.
• Rake out low spots as needed.
• Top up if erosion occurs after heavy rain or snowmelt.

How Much Do You Need?

Here’s a rough estimate:

• 1 cubic yard covers about 108 sq ft at 3 inches deep
• ½ yard covers about 54 sq ft at the same depth

We deliver 20mm road crush in ½ yard and 1-yard bags with free delivery in Calgary.

Final Word

20mm road crush is a durable, cost-effective way to build a surface that lasts. Compact it properly, slope it for drainage, and you’ll have a solid base that stays put—season after season.