How much should I budget to repair a heaved and cracked concrete driveway on a Saint John NB property?

Budget $6,000-$15,000 for driveway replacement if the heaving and cracking is severe, or $2,000-$5,000 for partial repairs if the damage is localized. The wide range depends on whether you can repair sections or need complete replacement, plus the underlying cause of the heaving.

Assessing the Damage and Repair Options

Heaved and cracked driveways in Saint John are typically caused by frost action, poor drainage, or inadequate foundation preparation. The Saint John area's 4-foot frost depth and Maritime freeze-thaw cycles are particularly hard on concrete that wasn't properly installed with adequate base preparation and frost protection.

If the heaving is minor (less than 1-2 inches of vertical displacement) and cracks are primarily surface-level, you might get away with concrete lifting and crack repair for $2,000-$5,000. Mudjacking costs $3-$6 per square foot and can level sunken or tilted sections, while polyurethane foam injection runs $5-$10 per square foot but provides better long-term stability. Professional crack injection with polyurethane or epoxy costs $500-$1,500 per major crack.

However, if the driveway has multiple heaved sections, wide cracks (over 1/4 inch), or pieces that have separated and shifted, full replacement is usually the most cost-effective long-term solution. A typical Saint John two-car driveway (400-600 square feet) costs $4,000-$8,000 for standard broom-finished concrete, or $6,000-$12,000 for stamped or decorative finishes.

Saint John Climate Considerations

Your new driveway must be built to handle Saint John's challenging conditions. This means air-entrained concrete is mandatory — standard concrete without air entrainment will fail again within 5-7 years under the Bay of Fundy's freeze-thaw cycles. The air-entrained mix adds about $200-$400 to the total project cost but extends the lifespan from 7 years to 25-40 years.

Proper drainage is critical in Saint John due to the area's clay soils and spring runoff patterns. The contractor should install a 6-inch compacted gravel base and ensure positive drainage away from the driveway surface. Poor drainage is often the root cause of the original heaving problem.

Additional Costs to Consider

Removal of the existing driveway adds $2-$5 per square foot ($800-$3,000 for a typical driveway). Excavation and base preparation can add another $1,000-$3,000 if the original base was inadequate or if drainage improvements are needed. If the heaving was caused by underground water issues, you might need drainage solutions like weeping tile or catch basins, adding $1,500-$5,000 to the project.

Timing matters significantly in Saint John. Plan this work for May through September when contractors are available and weather conditions are optimal. Winter repairs are possible but cost 25-40% more due to cold weather concrete requirements.

When to Hire a Professional

Driveway heaving diagnosis and repair requires professional assessment. The contractor needs to determine whether the problem is frost heave, settling, drainage-related, or caused by inadequate original construction. Getting this diagnosis wrong leads to repeated failures. Always get three quotes from contractors experienced with Saint John's soil and climate conditions, and verify they specify air-entrained concrete and proper base preparation.

Need help finding a professional concrete contractor? New Brunswick Concrete can match you with experienced Saint John area contractors who understand Maritime concrete challenges and can provide accurate assessments of your specific situation.