What Causes Asphalt Potholes in Winter?

Freeze-Thaw Cycles: The Main Culprit

One of the leading causes of asphalt potholes in winter is the freeze-thaw cycle. When temperatures drop, moisture from rain or melting snow infiltrates cracks in the asphalt surface. This water then freezes, expanding and putting pressure on the surrounding asphalt.

As temperatures rise, the ice melts and contracts, leaving behind small gaps. Repeated cycles of freezing and thawing weaken the asphalt, creating small voids that eventually become potholes.

Learn More: How to Winter-Proof Your Asphalt Parking Lot →

Heavy Traffic During Winter

Winter conditions don’t stop traffic from moving, and this steady flow of vehicles can worsen developing cracks. The weight of vehicles, especially heavy trucks, puts constant pressure on weakened asphalt.

Combined with the brittle condition of asphalt during freezing temperatures, this pressure can break apart the pavement and lead to potholes. Regular maintenance from our reliable asphalt repair company can help manage traffic impact on paved surfaces.

Poor Drainage Systems

Effective drainage is essential in preventing potholes, especially in winter. When water has nowhere to go, it pools on the asphalt surface and seeps into cracks. During the freeze-thaw cycle, this trapped water creates and enlarges potholes at a rapid pace.

Ensuring proper drainage around asphalt parking lots and driveways helps reduce the risk of potholes forming and extends the lifespan of the asphalt.

Use of De-Icing Chemicals and Salt

Salt and de-icing chemicals are essential for preventing ice buildup on roads and parking lots, but they can also speed up the pothole formation process. When salt melts ice, it turns into water that seeps into the asphalt’s small cracks and joints. This water then freezes, restarting the freeze-thaw cycle and weakening the asphalt. Over time, these chemicals can also erode the asphalt itself, creating more opportunities for potholes to form.

Quick Temperature Fluctuations

Sudden changes in temperature can stress asphalt surfaces. Rapid warming followed by a quick drop in temperature can cause the asphalt to expand and contract quickly. This fluctuation weakens the bond within the asphalt, making it prone to cracking and pothole development.

In Michigan, where temperatures can swing from warm to freezing within a day, asphalt repair becomes crucial for preserving the pavement’s integrity.

Repair Solutions for Winter Asphalt Damage

Winter poses challenges for permanent pothole repair, but there are effective solutions. For a long-lasting repair, our asphalt repair company in Lansing, MI, recommends using winter mix (hot) asphalt. This mix is specifically designed for colder months and offers a more durable fix.

However, for a quicker, temporary repair that can be applied in any weather, cold patch asphalt is a practical option. It fills potholes effectively, allowing traffic to resume safely until a more permanent solution is applied.

For driveway and parking lot repairs, trust our experts at McKearney Asphalt & Sealing!