Concrete driveway cracks not only detract from the driveway aesthetic but also create neglected long-term issues with structure. Fortunately, with the proper tactics, these cracks can be easily and affordably repaired. This guide walks through both professional and DIY options for repairing cracks in your concrete driveway, with an eye toward durability and a neat appearance.
Causes of Cracks in Concrete Driveways
The first step of proper repair is to understand why the cracks show up. The primary causes include:
- Soil Movement: The ground is always shifting, and when it does underneath a concrete driveway, the movement can crack it.
- Fluctuating temperatures: Expanse and contraction from freeze-thaw cycles cause estrés on the concrete.
- Heavy Loads Heavy weight (like heavy vehicles) can make the surface weaker after a while.
- Quick Fix: This comes back to poor (and squeegee!) installation: improper mixing or curing during installation causes weak points.
Image by Eppconcrete
Tools and Materials Needed for Repair
Before beginning any repair, gather the necessary tools and materials:
| Tool/Material | Purpose |
| Crack filler | Seals cracks to prevent water infiltration. |
| Wire brush | Cleans debris and loose material. |
| Chisel and hammer | Prepares the crack by widening for filling. |
| Concrete mix or patch | Repairs larger cracks. |
| Caulking gun | Dispenses filler evenly into narrow cracks. |
| Trowel | Smooths out the repair surface. |
| Protective gloves | Ensures safety during handling. |
Step-by-Step Guide to Fixing Cracks
Cleaning the Crack
Cleaning the crack thoroughly is the first step to loosening dirt and debris, as well as loose particles in a crack. For this step, you can scrape with a wire brush or compressed air. Cleaning the dermal filler site ensures adhesion.
Assessing the Crack
Next, measure the depth and width of the crack. Ignoring Hairline Cracks: Hairline cracks will need treatment that differs from the treatment for wider or deeper cracks;
Widening the Crack
If the crack is greater than ¼ inch, take a hammer and chisel and widen and deepen the crack a bit. This gives a nice edge for the repair material to stick to.
Repair Methods Based on Crack Size
Hairline Cracks
- Use a liquid crack filler designed for narrow gaps.
- Dispense the filler with a caulking gun, ensuring even distribution.
- Smooth the surface using a trowel.
Medium-Sized Cracks
- Apply a concrete patch or repair mix.
- Use a trowel to fill the crack and level the surface.
- Let it cure for the recommended time before use.
Large Cracks
- For cracks exceeding ½ inch, mix concrete for patching.
- Insert a foam backer rod if the crack is deep.
- Fill with concrete and smooth with a trowel.
- Cover with plastic sheeting to retain moisture during curing.
Finishing Touches
After the repair material cures, seal the concrete to protect from moisture and temperature changes. The driveway also benefits from a seal which improves its longevity and aesthetics.
Preventing Future Cracks
- Oversealing: Seal your driveway every two to three years, to reduce water infiltration.
- Manage Water Reposition: You drainage should not be directed towards or standing on/around the driveway.
- No Heavy Loads: Spread the weight, and don’t park the heavy vehicles in the same spot all of the time.
- Regular Upkeep: Take care of small problems early so they don’t snowball.
Common Mistakes to Avoid
- Skipping Cleaning: A dirty surface weakens the bond between the filler and concrete.
- Using Inappropriate Materials: Not all fillers or patches are suitable for every type of crack.
- Ignoring Curing Times: Rushing the process compromises the repair’s integrity.
- Overfilling Cracks: Overfilled cracks may lead to uneven surfaces.
DIY vs. Professional Repair
For minor to medium cracks, DIY repairs are effective and economical. However, if the driveway has extensive damage or structural issues, consult a professional. They can assess underlying problems and provide long-lasting solutions.
Estimated Costs for Driveway Repairs
| Type of Repair | DIY Cost | Professional Cost |
| Hairline Cracks | $10-$20 | $50-$100 |
| Medium-Sized Cracks | $30-$50 | $150-$300 |
| Large Cracks | $50-$100 | $300-$600 |
FAQs
How can I tell if a crack needs professional attention?
If the crack is deeper than ½ inch or runs the length of the driveway, it may indicate structural issues requiring professional help.
Can I fix driveway cracks in cold weather?
Repairs are best done in temperatures above 50°F for proper curing.
How often should I seal my concrete driveway?
Every 2-3 years, depending on wear and exposure to elements.
What is the best crack filler for concrete driveway?
Epoxy-based fillers provide excellent durability and adhesion.
Can pressure washing damage my driveway?
When done correctly, pressure washing cleans effectively without causing damage. Use a low-pressure setting to avoid erosion.
What’s the lifespan of a repaired driveway?
With proper maintenance, a repaired driveway can last 10-15 years or more.
