Cracks in pavement can happen for many reasons. From winter weather to sneaky tree roots, find out why asphalt splits and how to fix the damage
As a business owner, one responsibility you have is maintaining your parking lot so it’s smooth, attractive, and safe for customers. But this can be difficult when cracks seem to pop up from nowhere on a regular basis. These cracks look unprofessional, and if they get big enough, they can pose a serious hazard to anyone walking near them.
While you can’t prevent cracks from forming in your pavement entirely, knowing the common causes of these parking lot fissures can help you take measures to minimize how many you get.
Winter Weather
Winter can create new cracks through the freeze-thaw cycle. It can also make pre-existing cracks worse, which is why business owners should patch any vulnerabilities in their pavement in the fall before the first freeze.
When water seeps into the pavement and freezes, it expands. This expansion pushes against the asphalt or concrete, which causes internal stress. Once the ice melts, gaps remain, and the structure weakens. Over time, this repetitive process tears the pavement apart from the inside.
Heavy Loads
Most parking lots can handle standard passenger cars without issue. But heavy trucks like garbage collectors or delivery vehicles put massive amounts of stress on the surface.
If your lot wasn’t built to support that kind of weight, the pressure will eventually cause the pavement to fracture. You might notice these fissures appear where heavy vehicles frequently travel or park.
Tree Roots
Trees add aesthetic value to a property, but their roots can wreak havoc underground. As roots grow, they push against the soil and the base of your parking lot.
This upward pressure forces the pavement to buckle and crack. You might see raised bumps or uneven surfaces near landscaped islands or the edges of your lot where trees live.
Poor Installation
Sometimes the problem starts from day one. If the contractors didn’t prepare the sub-base correctly or if they used a weak asphalt mix, the lot will fail prematurely.
A weak foundation means the surface lacks proper support. The pavement will shift and settle unevenly, which leads to alligator cracking (a pattern that looks like reptile scales) relatively quickly after installation.
Water Seepage
Water is the enemy of asphalt. Besides the freeze-thaw cycle mentioned earlier, water can wash away the base material under your lot.
If drainage is poor, water pools on the surface and slowly penetrates the asphalt binder. This erosion creates voids underneath the pavement. Without solid ground to rest on, the asphalt collapses under the weight of cars, which creates potholes and significant cracks.
Protecting Your Parking Lot
These are some of the most common causes of parking lot cracks. Now that you know about them, you can take steps—like sealcoating often, crack repair, and drainage correction—to reduce the chance of splits or fractures forming. This way, your parking lot remains pleasant to the eye and safe for the visitors you count on.