How Summer Heat Affects Your Asphalt Driveway (And What You Can Do to Protect It)

Asphalt is designed to withstand changing weather conditions, but prolonged exposure to high temperatures and intense sunlight can take a toll over time. Understanding how heat affects your driveway can help you prevent costly repairs and keep your pavement looking its best for years to come.

Here's what every homeowner should know.

Why Does Heat Affect Asphalt?

Asphalt is a flexible paving material made from aggregates bound together with asphalt cement, a petroleum-based binder. During hot weather, that binder softens slightly, making the surface more susceptible to damage from heavy loads and everyday wear.

While professionally installed asphalt is built to handle seasonal temperature changes, extreme heat combined with heavy traffic can accelerate deterioration.

1. Softened Pavement

When temperatures rise into the 80s, 90s, or higher, your driveway surface becomes softer than usual.

This doesn't mean your driveway is failing—it simply means it's more vulnerable to pressure.

Common causes of damage include:

• Heavy trucks or delivery vehicles

• RVs or campers parked for extended periods

• Boat trailers

• Dumpster placement

• Motorcycle kickstands

• Trailer jacks or narrow support legs

These concentrated loads can leave dents or depressions in softened asphalt.

Tip: If possible, avoid parking heavy equipment in the same spot during periods of extreme heat.

2. Surface Oxidation from UV Rays

Heat isn't the only concern—the sun's ultraviolet (UV) rays slowly break down the oils that keep asphalt flexible.

Over time, oxidation can cause your driveway to:

• Fade from deep black to gray

• Become brittle

• Develop small surface cracks

• Lose flexibility

Sealcoating helps protect against UV damage by creating a protective barrier that slows oxidation.

3. Cracks Can Grow Faster

Small cracks often become more noticeable during hot weather.

As pavement expands during the day and cools at night, repeated movement can gradually enlarge existing cracks. If water enters those cracks and later freezes during winter, the damage can become much more extensive.

Early crack repair is one of the most cost-effective ways to extend the life of your driveway.

4. Oil and Chemical Stains Become More Problematic

On hot days, asphalt pores open slightly, making it easier for:

• Motor oil

• Gasoline

• Transmission fluid

• Power steering fluid

to penetrate the pavement.

These petroleum products can weaken the asphalt binder and contribute to premature deterioration.

Cleaning spills as soon as possible helps protect your investment.

5. Tire Marks May Appear

Sharp turns or sudden braking during very hot weather can leave temporary scuff marks on newer asphalt surfaces.

This is especially common during the first year after installation while the pavement continues to cure.

The best practice is to:

• Avoid turning the steering wheel while the vehicle is stopped.

• Make gradual turns whenever possible.

• Wait the recommended curing period before parking heavy vehicles on newly paved surfaces.

How to Protect Your Driveway During Hot Weather

A little preventative maintenance goes a long way.

Park Smart

Try not to park in exactly the same location every day. Rotating parking positions distributes weight more evenly across the driveway.

Avoid Heavy Loads

If possible, keep dumpsters, storage pods, RVs, and construction equipment off your driveway during extreme heat.

Keep It Clean

Remove leaves, dirt, and chemical spills before they have a chance to stain or damage the surface.

Sealcoat When Appropriate

Sealcoating helps protect asphalt from:

• UV rays

• Moisture

• Oxidation

• Oil spills

Most residential driveways benefit from sealcoating every 2–3 years, depending on traffic and weather exposure.

Repair Small Cracks Early

Addressing minor cracks before they expand can prevent larger—and more expensive—repairs later.

When Should You Consider Resurfacing?

If your driveway has:

• Widespread cracking

• Large potholes

• Drainage issues

• Extensive fading

• Uneven surfaces

it may be time to consider resurfacing or replacement.

A professional inspection can help determine the most cost-effective solution.

Trust Coastal Paving to Keep Your Driveway Looking Its Best

At Coastal Paving, we understand how New England's changing seasons—from summer heat to harsh winters—affect asphalt surfaces. Whether you need a new driveway, crack repair, sealcoating, or resurfacing, our experienced team delivers quality workmanship designed to stand the test of time.

Don't wait until small issues become major repairs.

Contact Coastal Paving today to schedule a free estimate and learn how we can help protect your driveway for years to come.

Frequently Asked Questions

Can hot weather melt my asphalt driveway?

No. Properly installed asphalt will not melt during normal summer temperatures. However, it can soften slightly, making it more susceptible to dents from heavy vehicles or concentrated weight.

Is it okay to park on asphalt during a heat wave?

Yes, but avoid leaving heavy vehicles, trailers, or equipment in one spot for long periods, especially if the driveway is new.

How often should I seal my driveway?

Most asphalt driveways should be sealcoated every 2–3 years, depending on traffic, sun exposure, and weather conditions.

Does rain after a heat wave damage asphalt?

Rain itself isn't harmful, but water entering existing cracks can lead to long-term damage. Keeping cracks sealed helps prevent moisture intrusion.

Get your free estimate today.