Where do I source bulk crushed limestone in Ottawa?

Bulk crushed limestone in Ottawa is available from several aggregate suppliers, with pricing typically ranging from $25 to $40 per tonne delivered depending on the specific grade and quantity ordered.

The primary sources for bulk crushed limestone in the Ottawa region include Rideau Paving & Materials (multiple Ottawa locations), Tomlinson Group (Manotick and Carlsbad Springs quarries), Miller Paving (aggregate division), and Preston Sand & Gravel (locations in Ottawa and surrounding areas). These suppliers stock various grades of crushed limestone including Granular A (25mm to 0mm), Granular B (100mm to 0mm), and specific sizes like 19mm clear stone for drainage applications.

For driveway projects specifically, you'll want Granular A limestone for the top base layer (150mm minimum depth in Ottawa) and Granular B limestone for the structural sub-base (300mm minimum depth due to Ottawa's deep frost line). Most suppliers require a minimum order of 5 to 10 tonnes for delivery, though some will deliver smaller quantities for an additional fee. Tomlinson's Manotick quarry is particularly convenient for south Ottawa (Barrhaven, Riverside South, Manotick) while their Carlsbad Springs location serves east Ottawa (Orleans, Gloucester, Rockland).

Ottawa's clay soil conditions make proper limestone base preparation critical. The limestone base must extend below the 1.2 to 1.5-metre frost line to prevent heaving. Many Ottawa suppliers also stock geotextile fabric ($0.50 to $1.50 per square foot) which should be placed between clay subgrade and limestone base to prevent soil migration. When ordering, specify the intended use (driveway base) and your soil conditions — suppliers can recommend the appropriate grade and depth.

Delivery scheduling is important during Ottawa's peak construction season (May through October). Book delivery 3 to 5 days in advance, and ensure your excavation is complete before the truck arrives. Standard tri-axle trucks deliver 15 to 20 tonnes and require adequate access — steep driveways or narrow laneways may require smaller trucks or additional delivery fees. Most suppliers provide same-day or next-day delivery within the Ottawa urban area.

When to hire a professional: While sourcing limestone is straightforward, proper excavation, grading, and compaction require specialized equipment. A plate compactor or vibratory roller is essential for achieving proper density in 150mm lifts. Most homeowners find it more cost-effective to hire a contractor who includes materials, delivery, and proper installation rather than managing the limestone sourcing and compaction separately.

Need help finding a driveway contractor who handles complete base preparation? Ottawa Driveways can match you with local paving professionals who source materials and ensure proper installation to Ottawa's frost depth requirements.