Is it better to patch or resurface an old cracked asphalt driveway in Ottawa?

The decision between patching and resurfacing depends on the extent and type of cracking, but in Ottawa's harsh freeze-thaw climate, resurfacing is usually the better long-term investment if more than 25-30% of your driveway shows significant cracking.

Patching works best for isolated damage — individual potholes, small areas of alligator cracking, or linear cracks that haven't spread extensively. Hot-mix patching costs $100-400 per pothole and can last 5-10 years when done properly. However, patching only addresses surface symptoms, not underlying base issues that often cause cracking in Ottawa driveways. If your driveway has multiple problem areas scattered across the surface, you'll end up playing an expensive game of whack-a-mole as new cracks appear each spring.

Resurfacing (overlay) makes sense when the existing base is stable but the surface layer has deteriorated from age, oxidation, and Ottawa's brutal freeze-thaw cycles. A 50mm asphalt overlay costs $3-6 per square foot and essentially gives you a new driving surface over your existing foundation. The key requirement is that your current driveway must be structurally sound — no major settling, heaving, or base failure. Resurfacing over a failed base locks in the problems beneath and will reflect every crack and movement from below within 1-2 Ottawa winters.

Ottawa's climate considerations are critical here. Our 50+ freeze-thaw cycles per winter turn small cracks into major problems rapidly. Water penetrates cracks, freezes and expands by 9%, then thaws and allows even more water to enter. Each cycle widens existing cracks and creates new ones. If your driveway already shows extensive cracking, patching individual areas won't stop the freeze-thaw damage from spreading to untreated sections.

Signs you should resurface instead of patch: widespread surface cracking covering more than 25% of the driveway, multiple areas of raveling or loose aggregate, faded and oxidized asphalt throughout, or surface damage from years of snowplow scraping. Signs you need full replacement, not resurfacing: major settling or heaving, large areas of alligator cracking, standing water that indicates base or drainage failure, or an existing driveway that's already been overlaid once.

Timing matters in Ottawa's short paving season. Resurfacing must be done between late May and early October when temperatures consistently stay above 10°C. The existing surface should be cleaned, cracks filled with hot-pour sealant, and any loose material removed before the overlay. A tack coat bonds the new asphalt to the old surface.

Cost comparison for an average Ottawa driveway: Extensive patching of multiple problem areas often costs $1,500-3,000, while resurfacing the entire driveway runs $2,500-5,500. Resurfacing provides a uniform appearance and resets the maintenance clock, while patching leaves you with a patchwork surface that will need ongoing repairs.

When to hire a professional: Both patching and resurfacing require hot-mix asphalt, proper temperature management, and compaction equipment. While homeowners can handle small crack filling with cold-pour products, anything involving hot-mix asphalt needs professional equipment and expertise.

Need help finding a driveway contractor? Ottawa Driveways can match you with experienced paving professionals who can assess whether your driveway is a good candidate for resurfacing or needs full replacement.

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