Alligator cracks in asphalt are a common issue for driveways and parking lots, signaling underlying problems that need immediate attention. These interconnected cracks resemble alligator skin, hence the name, and can lead to more significant pavement failures if not addressed promptly. Here's a step-by-step guide on how to repair these cracks effectively on your own.
What Causes Alligator Cracks?
Alligator cracks usually result from a combination of factors including poor drainage, subgrade failures, overloading, or simply wear and tear over time. Water infiltration exacerbates the problem, causing the material to fail and leading to the characteristic cracking pattern.
Step 1: Assess the Damage
Before you start the repair, it’s important to assess the extent of the alligator cracking. If the area is extensive or the subgrade is severely compromised, professional repairs might be necessary. For smaller areas, a DIY approach can be effective.
Step 2: Prepare the Area
- Clean the Area: Remove all debris, dirt, and loose asphalt bits from the cracked area. A stiff broom or a leaf blower can be effective in clearing out the space.
- Ensure Dryness: Make sure the area is completely dry. Moisture can prevent the repair materials from adhering correctly.
Step 3: Apply a Patching Product
- Select the Right Material: For DIY purposes, products like cold patch asphalt mix or a specially formulated alligator asphalt compound are suitable.
- Fill the Cracks: Apply the patching material directly into the cracks. Be sure to fill them completely and compact the material down into the cracks with a tamper.
- Level the Surface: Ensure the surface is level with the surrounding area to avoid any bumps or unevenness.
Step 4: Sealcoat the Repaired Area
Once the patch has set and cured (follow manufacturer instructions for curing times), apply a sealcoat over the entire area. This will not only protect the asphalt from further water intrusion and other elements but also give your driveway or parking lot a refreshed, new appearance.
Step 5: Regular Maintenance
After repairing alligator cracks, regular maintenance is crucial to prolong the life of your asphalt. This includes sealcoating every few years, filling new cracks as they appear, and ensuring good drainage around the pavement.
FAQs About Alligator Crack Repair
Q: Can I repair alligator cracks in cold weather? A: It’s best to repair asphalt when temperatures are at least 50°F and rising. Cold patch products can be used in cooler temperatures, but the results may not be as durable.
Q: How long before I can drive on the repaired area? A: This depends on the patching material used. Some fast-setting asphalt patches allow traffic in a few hours, while others may require up to 24 hours to cure properly.
Q: Do I need professional tools for the repair? A: Basic tools like a broom, tamper, and possibly a mixing paddle and a drill are usually sufficient for small DIY repairs. For larger areas, professional equipment may be needed.
By following this guide, you can effectively address alligator cracks and extend the life of your asphalt surfaces. Remember, early intervention is key to preventing minor problems from becoming major expenses. If the damage seems extensive, consulting a professional may be the best course of action.