How to fix sunken driveway sections

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Introduction

Have you noticed parts of your driveway sinking lower than the rest, creating uneven surfaces and unsightly dips? A sunken driveway isn’t just an eyesore—it can also be a safety hazard and a sign of underlying structural problems. Learning how to fix sunken driveway sections will help restore safety, improve curb appeal, and extend the life of your driveway. In this guide, we’ll cover the common causes, DIY repair methods, and long-term solutions for both asphalt and concrete driveways.

Why Fixing Sunken Driveway Sections Matters

A driveway that has settled or sunk is more than just inconvenient. Repairing it promptly is essential because:

  • Prevents accidents – Uneven surfaces create tripping hazards and damage vehicle suspensions.
  • Stops water pooling – Sunken areas collect water, which worsens cracks, mold growth, and erosion.
  • Protects driveway structure – Leaving dips unchecked allows further settling, leading to complete failure.
  • Boosts property value – A smooth, even driveway increases curb appeal and home value.

Addressing sinking issues early saves time, money, and future frustration.

Step-by-Step Guide to Fixing Sunken Driveway Sections

1. Identify the Cause of the Problem

Before repairing, determine why the driveway is sinking:

  • Poor base preparation – Insufficient compaction during installation allows settling over time.
  • Water damage – Improper drainage washes away supporting soil.
  • Tree roots – Roots under the driveway can cause sections to lift or sink.
  • Heavy loads – Repeated vehicle weight compacts the ground beneath.

Understanding the cause helps you choose the right repair method.

2. Gather the Right Tools and Materials

Depending on your driveway type and repair method, you may need:

  • Shovel, wheelbarrow, and tamper
  • Gravel or crushed stone (for re-basing)
  • Asphalt patch or concrete resurfacer
  • Drill and concrete leveling compound (for slabjacking)
  • Protective gloves, goggles, and work boots

3. Fixing Sunken Asphalt Driveways

Option 1: Remove and Refill the Sunken Area

  1. Cut around the sunken section with a saw or chisel to create clean edges.
  2. Remove the old asphalt with a shovel.
  3. Add gravel or crushed stone to build up the base, compacting it thoroughly with a tamper.
  4. Apply new asphalt patch material in layers, tamping each layer down.
  5. Smooth and level the surface with a trowel or asphalt rake.

This method is ideal for small sunken spots caused by poor compaction.

Option 2: Overlay with Fresh Asphalt

If the base is still stable but the surface has sunk slightly, apply a thin asphalt overlay:

  1. Clean and dry the area.
  2. Apply tack coat adhesive.
  3. Spread hot-mix asphalt or cold-patch material evenly.
  4. Compact and level for a smooth finish.

4. Fixing Sunken Concrete Driveways

Option 1: Slabjacking (Mudjacking)

This is the most effective method for lifting concrete slabs:

  1. Drill small holes into the sunken concrete.
  2. Pump a cement slurry or polyurethane foam underneath.
  3. The mixture fills voids and raises the slab back to level.

This method often requires professional equipment, but DIY foam kits are available for smaller jobs.

Option 2: Remove and Re-Pour Section

For severely damaged sections:

  1. Cut and remove the sunken slab.
  2. Re-compact the soil base and add a gravel layer.
  3. Pour new concrete, smoothing and finishing it to match the existing driveway.
  4. Cure properly before driving on it.

5. Improve Drainage

To prevent future sinking, correct any drainage problems around your driveway:

  • Install French drains or gutters to redirect water.
  • Grade the soil so water flows away from the driveway.
  • Remove trees with invasive root systems near the driveway.

6. Seal and Maintain the Driveway

Once repairs are complete, seal your driveway to protect against water infiltration and surface damage. Regular maintenance like crack filling, sealing, and cleaning prevents sinking from recurring.

Common Mistakes to Avoid

  1. Ignoring the Cause of Sinking
    Mistake: Patching the surface without addressing drainage or soil issues.
    Solution: Fix underlying problems first.
  2. Skipping Compaction
    Mistake: Filling a hole without tamping the base material.
    Solution: Compact thoroughly to prevent future settling.
  3. Using the Wrong Repair Method
    Mistake: Applying concrete patch to asphalt (or vice versa).
    Solution: Match repair materials to your driveway type.
  4. DIYing Large Structural Problems
    Mistake: Attempting to lift a large slab without proper equipment.
    Solution: Hire professionals for major sinking issues.
  5. Not Sealing After Repair
    Mistake: Leaving the surface unprotected.
    Solution: Apply sealant to prevent water penetration and erosion.

Extra Driveway Tips & Hacks

  • Temporary Fix for Small Dips: Use gravel or sand to fill low spots until permanent repairs are made.
  • Polyurethane Foam Kits: These DIY kits are lighter, faster, and longer-lasting than traditional mudjacking.
  • Annual Inspections: Walk your driveway each spring to catch early signs of sinking or cracking.

Want to know how to protect against smaller issues? Check out our guide on how to patch and seal cracks in an asphalt driveway for preventative maintenance.

Conclusion

Learning how to fix sunken driveway sections is an important part of home maintenance. Whether you have asphalt or concrete, addressing the issue promptly restores safety, prevents water pooling, and enhances curb appeal. By identifying the cause, choosing the right repair method, and maintaining your driveway with proper sealing and drainage, you’ll avoid bigger and more costly problems later.

Final Tip: If your driveway shows widespread sinking or structural failure, consider professional slabjacking or resurfacing. For smaller sections, DIY repairs are affordable, effective, and manageable over a weekend. Bookmark this guide to keep your driveway even, safe, and looking its best.