One sharp pothole can do more damage to a tyre or wheel alignment than a year of normal driving. Here's exactly why they form, and how to fix them for good.
A pothole is a bowl-shaped hole that forms when the asphalt surface and the layers beneath it break down. It is not just surface damage, it's a sign that water and stress have already compromised the structure underneath.
Most councils across Victoria report a sharp rise in pothole complaints every winter and early spring. The pattern is consistent year after year, and it almost always traces back to the same root cause: moisture trapped beneath the asphalt.
Once water seeps through a small crack and reaches the base layer, it weakens the soil and gravel underneath. Add the weight of a car, and the surface collapses inward.
Repeated weight from vehicles, especially trucks and vans, accelerates wear. Engineering studies consistently show repeated loading predicts early pavement failure.
Asphalt laid too thin, compacted poorly, or installed over an unstable base is set up to fail years before it should, even if it looks fine at first.
Hot days followed by cold nights make the surface expand and contract repeatedly, gradually weakening the bond between layers and creating fractures.
Asphalt typically lasts fifteen to twenty-five years depending on installation quality and traffic load. As it ages, the binder holding the aggregate together becomes brittle, and brittle asphalt cracks more easily under stress. Regular sealing and maintenance can stretch that lifespan considerably.
Spider web or alligator-style cracking is often the first visible clue that water has started working into the base layer. Left untreated, it almost always progresses to potholes within one or two wet seasons.
If a section of driveway or car park feels slightly soft or bouncy underfoot, the base beneath it has likely already weakened. This is your window to act before the surface gives way.
Asphalt should shed water, not hold it. Puddles that linger long after rain usually point to poor drainage or a low spot that is quietly eroding the base below.
A repair that actually holds through Australian winters follows the same five steps, every time.
Cutting out the entire damaged section, not just patching the visible hole, including any weakened or saturated base material underneath.
A stable gravel or aggregate base is compacted back into place. This is what separates a temporary fix from a repair that lasts.
Hot mix bonds more effectively with the surrounding surface and compacts to a denser finish that resists water penetration far better than cold patch.
The new asphalt is compacted thoroughly and edges sealed against the existing surface, since unsealed joints are a common spot for water to sneak back in.
Freshly laid asphalt needs time to cure before handling full vehicle weight. Rushing this is one of the most common reasons cheap patch jobs fail within months.
Can plug a hole temporarily, but rarely addresses the weakened base underneath. Within a season or two, the same spot often reopens, sometimes larger than before.
Diagnoses the actual cause of the failure, not just the visible symptom. That distinction is exactly why proper repairs hold up for years rather than weeks.
Regular sealing, prompt crack repair, and good drainage are the three biggest factors in extending asphalt life. Checking your driveway or car park each autumn before winter rain sets in can catch small cracks before they become expensive structural problems.
Routine inspection costs nothing but a few minutes, while a full pothole repair, base rebuild, and resurfacing job costs considerably more. Catching problems early is consistently the cheaper path.
Potholes rarely fix themselves, and they never get smaller with time. Mr Asphalt has spent over 30 years fixing exactly this problem across Melbourne's South Eastern suburbs, the Mornington Peninsula, and South Gippsland.
