Understanding Driveway Cracks
Cracks in your driveway are more than just an eyesore—they’re often early indicators of deeper structural or environmental issues. At Redbank Plains Surfacing Solutions in Redbank Plains, QLD, we help clients identify and resolve these problems before they become costly repairs. Knowing what causes driveway cracks and how to address them can save time, money, and stress.
Common Causes of Driveway Cracks
Several factors contribute to driveway cracks, many of which are preventable with timely intervention and proper installation.
Poor Subgrade Preparation
When the base beneath the driveway isn’t properly compacted or stabilised, it can lead to uneven settling and surface cracking.
Heavy Vehicle Loads
Driveways not designed for high loads may begin to crack under the weight of repeated pressure from larger vehicles or machinery.
Weather Extremes
Queensland’s cycle of intense sun, followed by rain, can cause expansion and contraction in the surface material, eventually resulting in cracks.
Water Infiltration
Water that seeps into the surface can weaken the base layer, especially if drainage is poor.
Tree Roots
Nearby trees may have root systems that grow underneath the driveway, lifting and cracking the surface over time.
Types of Driveway Cracks
Each type of crack tells a different story. Understanding the type helps determine the right repair approach.
Hairline Cracks
These fine cracks are typically cosmetic and occur on the surface. Often caused by shrinkage during curing, they require monitoring but not immediate repair.
Linear or Longitudinal Cracks
Running parallel to the driveway, these are often caused by subgrade movement or poor joint placement. They may widen over time if left untreated.
Alligator Cracks
These resemble the skin of an alligator—interconnected and often widespread. They’re usually a sign of base failure and indicate the need for more than surface repairs.
Edge Cracks
These appear along the sides of the driveway and may result from lack of support or pressure from encroaching vegetation.
Block Cracks
Forming rectangular patterns, these cracks can result from temperature-related shrinkage or aged bitumen that’s lost its flexibility.
Repair Options for Cracked Driveways
Different types of cracks call for different repair techniques. At Redbank Plains Surfacing Solutions, we tailor our methods to the problem and site conditions.
Crack Sealing
Best for hairline and minor linear cracks, crack sealing involves applying a specialised sealant to prevent water ingress and slow progression.
Patching
Used for isolated, moderate damage. The cracked section is removed and replaced with new asphalt or bitumen to restore structural integrity.
Resurfacing
For surfaces with widespread cracking but stable bases, resurfacing applies a fresh overlay. This restores appearance and function without full replacement.
Full Reconstruction
Severe cases like extensive alligator cracking may require the entire section to be excavated, regraded, and resurfaced.
Preventative Maintenance
In many cases, scheduled maintenance like sealcoating, surface cleaning, and grading can prevent minor cracks from turning into major defects.
Preventing Future Damage
To protect your driveway investment, we recommend:
- Ensuring proper drainage design
- Avoiding parking heavy vehicles in the same spot repeatedly
- Trimming back tree roots near the edge of the surface
- Scheduling regular surface inspections
Conclusion
Driveway cracks can develop for a variety of reasons, but they don’t have to lead to full-scale replacement if addressed early. At Redbank Plains Surfacing Solutions in Redbank Plains, QLD, we’re committed to helping homeowners and property managers maintain strong, long-lasting driveways through expert advice and reliable repair techniques. If you’ve noticed cracks forming in your driveway, now is the time to act—before the problem spreads and becomes more costly.
Call us on: 07 4517 4097
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