Potholes are one of the most common and frustrating issues affecting asphalt roads and driveways. Not only are they unsightly, but they also pose safety hazards, damage vehicles, and contribute to faster pavement deterioration when left unchecked.
At Gatton Surfacing Solutions, we understand the specific causes and conditions that lead to pothole formation across Gatton and regional Queensland. Whether you’re managing a rural road, residential driveway, or commercial access area, identifying the root causes of potholes is essential to preventing them and preserving your surface long-term.
Here’s a closer look at what causes potholes — and what you can do to minimise the risk.
How Do Potholes Form?
Potholes develop when moisture penetrates the surface of asphalt and affects the base layers underneath. As vehicles drive over the weakened area, the asphalt above begins to crack and eventually breaks apart, forming a depression or hole.
While this process can occur gradually, it can accelerate quickly under the right conditions.
The Most Common Causes of Potholes
1. Water Infiltration
Water is the number one enemy of asphalt surfaces. When rainwater or irrigation seeps through small cracks in the pavement, it weakens the underlying sub-base.
Contributing factors include:
- Poor surface drainage
- Lack of proper fall or grading
- Blocked stormwater systems
- Inadequate sealing of cracks and joints
Once the sub-base is saturated, it loses its load-bearing capacity, leading to failure when traffic passes over the area.
2. Heavy Traffic Loads
Asphalt is designed to handle specific traffic volumes and weight. When roads or driveways experience traffic beyond their intended load — such as frequent truck access or turning vehicles — the pressure can strain weak spots and speed up surface breakdown.
3. Surface Cracking
Alligator cracking, linear cracks, or edge cracks are early warning signs. These small openings allow water, debris, and air to infiltrate the asphalt structure, compromising its integrity over time.
Without prompt crack sealing or patching, these small issues become large problems.
4. Weak or Poorly Compacted Base
The strength of your asphalt surface is only as good as the foundation it’s built on. If the base layer was not properly compacted during installation, it won’t support the surface effectively.
Other base-related issues include:
- Inadequate material selection
- Ground movement or subsidence
- Erosion from underground water flow
A weak base can’t absorb the stress of traffic, which leads to movement and surface damage.
5. Temperature Fluctuations
While Gatton’s climate is generally warm, even moderate temperature swings can affect asphalt. Expansion during hot days followed by contraction in cooler nights causes stress within the asphalt layers.
Over time, this expansion–contraction cycle can cause cracking, allowing water to enter and start the pothole formation process.
6. Ageing Asphalt
As asphalt ages, it becomes more brittle and prone to cracking. Oxidation from UV exposure dries out the surface oils, making it less flexible and more likely to fracture under load.
If your surface is more than 10–15 years old and hasn’t been resealed, it may be more susceptible to potholes.
Why Addressing Potholes Promptly Matters
Ignoring potholes can lead to:
- Increased repair costs down the track
- Accelerated wear of surrounding pavement
- Liability risks for property owners or businesses
- Vehicle damage and potential safety incidents
At Gatton Surfacing Solutions, we offer fast and professional pothole repairs to stop further deterioration and restore surface integrity.
How to Prevent Potholes
While no surface is completely immune, many potholes can be prevented with proactive care and quality construction.
Key prevention strategies include:
- Regular surface inspections to identify early signs of wear
- Crack sealing to prevent water intrusion
- Proper drainage design to move water away quickly
- Timely resurfacing or resealing to extend lifespan
- Professional installation with correct base preparation and compaction
Working with an experienced team like Gatton Surfacing Solutions ensures your surface is built and maintained with these principles in mind.
Conclusion
Potholes are more than just a nuisance — they’re a symptom of deeper issues that, if left untreated, can compromise the safety and value of your asphalt surface. Whether caused by water damage, traffic stress, poor base work, or ageing, understanding how potholes form is the first step in preventing them.
At Gatton Surfacing Solutions, we help property owners and councils across Gatton, QLD, take a proactive approach to asphalt care. From installation to repairs and ongoing maintenance, our team delivers expert service and durable results.
If you’re dealing with potholes or want to prevent future damage, contact Gatton Surfacing Solutions today for a site assessment and tailored recommendations.
Call us on: 07 4517 4097
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