Should my Ottawa interlock driveway have a soldier course border?

A soldier course border is highly recommended for Ottawa interlock driveways — it provides essential edge restraint that prevents paver shifting during freeze-thaw cycles and creates clean, professional-looking borders that resist damage from snowplows and lawn equipment.

A soldier course consists of pavers installed perpendicular to the main field pattern, typically around the entire perimeter of the driveway. In Ottawa's extreme climate, this border serves critical structural and aesthetic functions that become especially important during our harsh winters.

Structural Benefits in Ottawa's Climate

The soldier course acts as a rigid edge restraint system that locks the entire paver field together. During Ottawa's 50+ annual freeze-thaw cycles, the ground beneath your driveway expands and contracts repeatedly. Without proper edge restraint, individual pavers can shift outward, creating gaps, uneven surfaces, and trip hazards. The soldier course, when properly installed with concrete edge restraint behind it, prevents this lateral movement and maintains the integrity of your driveway pattern.

Ottawa's heavy snow loads and aggressive snowplowing put additional stress on driveway edges. Snowplow blades frequently catch raised or shifted pavers, especially along the edges where the paver field meets grass or garden beds. A soldier course creates a defined, stable edge that better withstands this abuse. The perpendicular orientation of soldier course pavers also provides better resistance to the lateral forces created when snow is pushed to the sides of your driveway.

Installation Requirements for Ottawa

Your soldier course must be installed with proper edge restraint — typically a concrete haunching (concrete backing) that extends below the frost line. In Ottawa, this means the concrete edge restraint should extend at least 300mm below the finished grade to prevent frost heaving. The soldier course pavers sit against this concrete backing, creating an immovable edge that holds the entire field in place.

The soldier course should use the same thickness pavers as your field (typically 60mm for residential driveways) and be set on the same bedding sand base. Polymeric sand in the joints between soldier course pavers and between the soldier course and field pavers is essential — it hardens when activated and resists washout during spring snowmelt and heavy rains.

Design and Cost Considerations

Soldier courses work with virtually any paver pattern — herringbone, running bond, basketweave, or random patterns. The contrasting orientation creates visual definition even when using the same paver colour throughout. Many Ottawa homeowners choose a contrasting colour for their soldier course to create a more dramatic border effect.

Expect to add $3 to $6 per linear foot to your project cost for a soldier course installation, including the concrete edge restraint. For an average Ottawa driveway with 60 metres of perimeter, this adds roughly $200 to $400 to the total project cost — a worthwhile investment for the structural benefits and enhanced appearance.

When to Hire a Pro

Soldier course installation requires precise excavation for the concrete edge restraint, proper concrete mixing and placement, and careful paver cutting and fitting. The concrete haunching must be placed at the correct depth and slope to provide effective edge restraint without creating drainage problems. This is definitely professional contractor work — improper edge restraint installation leads to border failure and field paver shifting within the first winter.

Find local paving contractors experienced with interlock installation through the Ottawa Construction Network directory to ensure your soldier course is installed to withstand Ottawa's challenging climate conditions.