Asphalt Problems Caused By Heavy Rain
We get our share of heavy rain in the Lehigh Valley, and nothing exposes asphalt problems faster than a good downpour. A surface that looks fine when it’s dry can reveal all kinds of weak spots once water is moving across it. If you’ve noticed your driveway or lot acting up after a storm, the rain is telling you something worth paying attention to.
Here are the issues we see most often after heavy rain, and what each one usually means.
Standing Water and Pooling
The most common red flag is water that pools and just sits there long after the rain stops. Asphalt is supposed to shed water, so pooling means the surface isn’t graded properly or has settled in spots. Beyond being annoying, standing water is destructive. It seeps into the surface, works into cracks, and in winter freezes and pries the asphalt apart. Birdbath-style low spots tend to get worse over time as the trapped water keeps softening the area.
Cracks That Show Their True Size
Rain has a way of revealing how bad cracks really are. Water finds every opening, and you’ll often see it disappearing into cracks you didn’t realize were that deep. Those cracks are highways for water to reach the base. Once water gets under the surface, it undermines everything above it. Prompt crack repair after you spot this keeps a manageable problem from turning into a structural one.
Soft Spots and Sinking
If an area feels soft underfoot after heavy rain or you notice the surface sinking, water has likely gotten into the base and washed out or weakened the support underneath. This is more serious than a surface crack. A failing base won’t fix itself, and patching over it rarely holds. These spots need the base addressed, not just the top. It’s a common issue on older driveways and lots across the region.
Eroded or Crumbling Edges
Driveway and lot edges are vulnerable, and fast-moving water during a storm can erode the soil that supports them. Once that support washes away, the edges start to crumble and break off. You’ll see loose chunks and a ragged border. Catching this early, before the erosion spreads inward, saves a lot of repair.
Why Drainage Is the Root of It
Almost every rain-related asphalt problem traces back to drainage. Asphalt and water are long-term enemies, and a surface that doesn’t move water off itself efficiently will fail faster, period. Good drainage isn’t an afterthought. It’s the foundation of a durable driveway or lot. When we plan a paving project, grading and water management are part of the design, not something tacked on at the end. Our driveway paving and parking lot paving work both start with how water will move across the surface.
What to Check After a Storm
Next time we get a soaking rain, take a few minutes afterward to walk your driveway or lot and look for:
- Water pooling instead of draining off
- Cracks that water is running into
- Soft or sinking areas
- Edges that are eroding or crumbling
- New low spots that weren’t there before
Catching these early is the difference between a small fix and a big one. A crack sealed today is far cheaper than a base repair next year.
When It’s Time to Call
Isolated cracks and minor pooling can often be handled with targeted repair. But if you’re seeing widespread pooling, soft spots, or sinking, the rain has likely uncovered a base or drainage issue that needs a closer look. Our asphalt repair services cover everything from sealing cracks to addressing the drainage problems behind them.
For regional stormwater and flooding information, your local municipal stormwater resources and PA 511 for road conditions can both be helpful after a major storm.
If a recent storm left your driveway or parking lot looking worse for wear, don’t wait for the next one. Property owners in Lehigh County and western Northampton County can request an estimate and we’ll find out what the water is really doing to your asphalt.