What type of asphalt mix do Ottawa paving companies use and does the mix quality actually matter for our winters?

The asphalt mix used on your Ottawa driveway absolutely matters, and understanding the basics can help you ask the right questions before signing a contract.

Superpave Asphalt Mix — The Ontario Standard

Most reputable Ottawa paving contractors use Superpave (Superior Performing Asphalt Pavements) mixes, which were developed specifically for Canadian climate conditions. The MTO (Ministry of Transportation Ontario) specifies Superpave mixes for provincial roads, and the same technology applies to residential driveways. In Ottawa, the standard residential mix is typically a Superpave 12.5 mm surface course — the "12.5" refers to the maximum aggregate size.

Why Mix Design Matters in Ottawa

Ottawa's temperature swings from +35°C in July to -30°C in January put extraordinary stress on asphalt. A properly designed Superpave mix accounts for this by using a Performance Grade (PG) binder rated for our local climate — typically PG 58-34 or PG 64-28 for the Ottawa region. The first number is the high-temperature rating, the second is the low-temperature rating. A mix with the wrong PG binder will crack prematurely during our freeze-thaw cycles.

Hot Mix vs. Cold Patch

Always insist on hot mix asphalt (HMA) for new installations and full resurfacing. Hot mix is produced at plants like Tomlinson's facilities in the Ottawa area at temperatures around 150°C, ensuring proper binding. Cold patch is a temporary repair material only — any contractor proposing cold mix for a full driveway is cutting corners. Ottawa's paving season typically runs from May through October when ambient temperatures stay above 10°C for proper compaction.

What to Ask Your Contractor

Before hiring, ask these specific questions about materials: What Superpave mix designation are you using? What PG binder grade? Which asphalt plant are you sourcing from? A knowledgeable contractor will answer these without hesitation. In the Ottawa market, expect to pay between $3.50 and $5.50 per square foot for a standard two-lift asphalt driveway using quality Superpave mix, with the exact price depending on base condition, access, and total area.

Thickness Requirements

For residential driveways in Ottawa, the standard is a minimum 2-inch (50 mm) compacted surface course over a properly prepared granular base. Many contractors recommend a two-lift system — a 1.5-inch base course of Superpave 19 mm followed by a 1.5-inch surface course of Superpave 12.5 mm — for better durability, especially in neighbourhoods like Barrhaven and Kanata where clay subsoils are common.

Connect with a local contractor through Ottawa Driveways to discuss the right asphalt mix specification for your property and get a detailed quote.

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Looking for experienced contractors? The Ottawa Construction Network connects Ottawa homeowners with qualified professionals:

• Homeupgraders
• RenoMotion Inc.
• Elie The Carpet Guy Inc.
• Callandgone
• JMY Renovations