A driveway paved with asphalt makes for a durable and cost-efficient choice of material to be installed in residential properties. However, without any regular maintenance practices, exposure to the elements will reduce the lifespan of such a driveway to only 10-12 years.
With proper pavement preservation, however, the lifespan of an asphalt driveway will be prolonged to 25 years or more. While the key to the longevity of any driveway starts with choosing reliable providers of services, regular maintenance by american paving paving companies knoxville tn is what keeps it in good condition for years to come. According to studies, every $1 spent on preventative maintenance brings savings of up to $5 on structural repairs.
Understanding Asphalt Degradation: UV, Water, and Loads
Asphalt consists of aggregate rocks mixed with a liquid petroleum binder. In particular, there are three main factors causing asphalt degradation:
- UV Oxidation: Sunlight degrades the molecular bonds of asphalt liquid binders. This results in loss of black color, graying of the surface, and brittleness.
- Water and Freeze-Thaw Cycles: Water getting under the thin cracks and freezing in winter puts a lot of pressure inside the surface, resulting in potholes and fissures.
- Load Stress: Commercial vehicles or frequent dumping of dumpster bins can put load on a weak sub-base and damage asphalt.
Essential Routine Maintenance Practices
Simple habits and small daily chores have a tremendous effect on the longevity of an asphalt surface. These include:
- Chemical Spills Clean-Up: Engine oil, gasoline, and brake fluid soften the petroleum binder in the asphalt. Employ cat litter or some other absorbent substance and then wash with mild detergent.
- Edge Clearing: Tall grass and roots may push into the edges of the driveway, causing cracks and accumulating water near the perimeter.
- Load Distribution: Do not park heavy RVs or any other equipment on the edges of the driveway, which is the weakest spot.
Comparative Maintenance Breakdown
| Maintenance Action | Frequency | Hazard Prevented | Effort Level |
|---|---|---|---|
| Surface Sweeping & Degreasing | Monthly | Chemical binder softening & debris wear | Low (DIY) |
| Crack Sealing (<1/2 inch) | Annually (Fall) | Sub-base water penetration & freeze expansion | Medium (DIY/Pro) |
| Protective Sealcoating | Every 2-3 Years | UV oxidation & surface raveling | Medium-High (Pro) |
| Sub-Base & Edge Repair | As Needed | Potholes & structural edge collapse | High (Pro) |
Water Drainage and Sub-Base Protection
Asphalt is most vulnerable to water damage. Water that pools up on the surface will eventually find its way down to the sub-base made of gravel.
As soon as the sub-base becomes wet, the weight of the vehicles leads to the compression of the asphalt surface and pothole formation. Make sure that the lawn around the driveway is graded away from the asphalt, and the downspout discharges water at least three feet from the driveway surface.
Crack Sealing and Sealcoating Timelines
Preventive treatments of the asphalt surfaces keep moisture out and restore its elasticity.
- Crack Sealing: Any crack bigger than a quarter of an inch wide needs to be sealed immediately. This should be done with hot pour, rubberized crack sealant. This is a process of making a flexible, watertight seal that allows the asphalt to move with changes in temperature.
- Sealcoating: A high-quality coal tar or asphalt-emulsion sealcoat needs to be applied every two to three years. Sealcoating protects the asphalt from UV damage and seals any fuel leaks. Don’t apply a sealcoat every year because too many layers may crack off or peel off.
Partnering with Professionals for Long-Term Value
While some tasks such as sweeping and crack filling are easy to do yourself, others need professional equipment. In cases of extensive cracking (spider web or alligator cracking) or base depressions, professional intervention is required. Consultation of experienced specialists like american paving paving companies knoxville tn will help you to access industrial asphalt patching, infrared joint heating, and other professional resurfacing techniques that will prolong the life of your driveway without fully tearing out.
The protection of the asphalt driveway is easy if performed on a regular basis and does not require high costs. All you need to do is to take care of proper water drainage, annual crack sealing, and application of seal coat once in a few years.