Nothing lasts forever, and asphalt is no exception. There comes a time with every parking lot where you need to ask whether it’s time to repair it, or replace it altogether.
A properly paved asphalt lot can last 20 – 30 years, but the lifespan and condition of any lot depend on many factors. Let’s take a look at the various kinds of damage and repairs, and when you should replace a lot entirely.
The Types of Asphalt Damage
Cracking
Cracking can take many forms, including shrinkage, widening, edge cracks, slippage, alligator cracks, and reflection. Cracks are caused by many different factors, such as water penetration, oxidation from the sun, freezing, and thawing, and poor initial construction. Even the most minor cracks should be sealed as soon as possible, as small cracks can grow into bigger problems. Water or other debris can settle inside, causing the crack to grow, softening the base, and further threatening the integrity of the pavement. Larger cracks may be a warning sign of deeper issues.
Rutting
Rutting is when the pavement shows depressions, or grooves, from wear and tear caused by wheel loads. Ruts can be dangerous, leading to vehicles hydroplaning (from ponded water) that can result in loss of driver control. They can also be a result of deeper sub-soil or design problems, and lead to further deterioration. Ruts less than ⅓ inch deep can generally be left as is, but deeper ruts should be leveled and resurfaced.
When It’s Time To Repair
Crack Sealing
Crack sealing is exactly what it sounds like – filling small cracks to prevent further damage. Cracks that are straight or less than a quarter-inch wide can easily be repaired with a liquid filler. Before sealcoating or resurfacing, all cracks and existing damage must be repaired, so crack sealing is the first step towards further repair and necessary ongoing maintenance responsibility. A yearly schedule of crack sealing is best to prolong the life of your lot.
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