Cracks in a concrete driveway can be repaired using the right materials and techniques based on the crack type and severity. Whether it’s hairline cracks or deeper fractures, timely repair can restore both function and appearance without needing a full replacement.
In this blog, we’ll walk through the types of cracks, what causes them, and how to fix each one effectively. If you’re looking for reliable concrete crack repair services in Killeen, TX, reach out to Killeen Concrete Contractor for free consultation!
Phone: (254) 320-5757
Email: contact@killeenconcretecontractors.com
Why Do Driveways Crack?
Understanding the “why” behind cracks is essential before attempting any repairs. The most common reasons include:
Soil Settlement: Shifting or sinking ground causes uneven pressure.
Temperature Fluctuations: Expansion and contraction during hot/cold cycles.
Heavy Loads: RVs, trucks, and machinery can exceed the driveway’s load-bearing capacity.
Poor Installation or Curing: If the concrete wasn’t mixed or cured properly, cracks are more likely.
How to Repair Cracks in Your Concrete Driveway?
Step 1: Clean the Crack Thoroughly
Use a wire brush to remove debris, followed by a power washer or garden hose. Allow it to dry completely.
Step 2: Assess the Crack Width
Less than ¼ inch: Use a liquid crack filler or concrete caulk.
Wider than ¼ inch: Go for cement patching compound.
Step 3: Prepare the Repair Product
Follow the manufacturer’s instructions for mixing. For caulk-based products, no mixing is needed.
Step 4: Fill the Crack
Apply the filler or patching mix into the crack using a caulking gun or trowel. Smooth it out for a flush finish.
Step 5: Allow to Cure
Let the repaired section cure fully before using the pathway. Most products need 24–48 hours.
Types of Cracks
1. Hairline Cracks
These are thin surface cracks, usually from shrinkage. They’re mostly cosmetic but should still be sealed to prevent water entry.
2. Expansion Cracks
Caused by temperature-induced expansion, they often follow control joints. These can be sealed with flexible caulk or joint fillers.
3. Settling Cracks
These result from poorly compacted subgrades. The slab sags in specific areas. They might need leveling or slab jacking.
4. Structural Cracks
Wider than ¼ inch, these cracks often indicate load or foundation problems. They require professional assessment and deep patching.
Long-Term Tips to Prevent Future Cracks
Even the best repair job won’t last without maintenance. Here’s how you can protect your driveway long-term:
Seal the driveway every 2–3 years
Avoid using de-icing salts in winter
Don’t overload the surface
Divert water away with proper drainage
Hire professionals for proper installation and grading
Frequently Asked Questions (FAQs)
1. Can I repair cracks in my concrete driveway myself?
Yes, minor cracks can be DIYed. But for larger or recurring issues, hiring a professional ensures a permanent fix.
3. Will the cracks come back after repair?
If underlying causes like soil movement aren’t addressed, they might return. That’s why a full evaluation is crucial.
4. Is crack repair cheaper than full driveway replacement?
Absolutely. Repairing cracks can extend the life of your driveway and save thousands on replacement.
