Can You Put New Asphalt Over Old Asphalt?

When a driveway begins to show signs of deterioration and intense wear it’s time to decide how to deal with it before it becomes a larger issue.

Even with regular maintenance and care, years of heavy use can cause small cracks in the surface of an asphalt driveway. Some cracks are unavoidable in certain situations.

If you live in a freeze-thaw climate there is expansion and contraction of the ground which can crack the surface. This can happen as early as the first year the driveway goes through a Winter/Spring cycle.

Tree roots can also crack a driveway as well as earth movement. In these situations, homeowners need to assess how serious the problem is and find the best way to fix it. 

One possible solution to enhance a worn-out driveway is to apply an asphalt overlay but is this always the best solution? Let’s explore some of the pros and cons of applying new asphalt over old asphalt vs. installing a new replacement driveway.

What Is An Asphalt Overlay?

Asphalt overlay is an asphalt repair method in which a new layer of asphalt is applied over the existing pavement. Generally, the new layer is at least 1.5 inches in thickness.

It’s also known as resurfacing. The existing layers are used as a base and a new layer of asphalt is applied to the surface. Even though the top layer of a driveway may have a worn and cracked appearance it may still have structural integrity beneath.

If a solid base remains then an overlay might be the way to go. 

How Long Does An Asphalt Overlay Last?

An overlay will last about 10-15 years whereas a complete removal and replacement will last around 20 to 30 years. This can differ depending on climate, heavy usage, the condition of the current surface, and other factors. 

Additionally, when it comes to an asphalt overlay, keeping up with routine maintenance and taking proper care of your driveway will help ensure its longevity. Check out our complete guide to asphalt maintenance and care.

When Is An Asphalt Overlay The Best Option?

An overlay can be appropriate if there are small issues like minor surface cracks, minor water damage, or if it’s uneven. 

Some people prefer this method to the other option of removing and replacing their entire driveway because it can be more cost-effective.

In some situations, it may actually be a wiser decision to remove and replace rather than simply applying an overlay. The choice depends on the condition of the existing pavement. Making the wrong choice could lead to more costly repairs.  

An asphalt overlay is generally recommended when the existing asphalt is in decent shape. The existing surface needs to be: 

• Structurally sound 
• Clean and free of large debris and dirt 
• Capable of binding with the new layer 
• Able to provide adequate drainage

This means there is no large cracking in the pavement or deterioration of the binder. If cracks in the pavement go all the way to the base an overlay will not fix the problem in the long term. 

When Should You Avoid Installing An Overlay On Your Asphalt Surface

If there are major problems like large potholes or improper drainage the best solution is to remove and replace the whole driveway. An overlay that is applied over an unstable base will end up cracking within a few years of installation—likely during the first winter after the repair is done. 

If you want to be absolutely sure that you will not have to repair your driveway again in a year or two your best bet is to remove and replace your deteriorating driveway. It’s the best way to remove all of the underlying issues that may have caused the damage in the first place.     

If your current surface is not draining properly an overly will not solve the issue. More than likely, the driveway will need to be regraded so it can drain water more effectively. 

Every situation is unique so it may be best to consult with a professional asphalt contractor before making a decision. They can give insight into issues that may not be obvious to the average homeowner.

Consult a professional asphalt paving company

Before paving a new layer of asphalt over the existing layer, consult with a professional asphalt company. If you want to be sure that you have the best information contact the people at Blacktop Concepts.

Blacktop Concepts has been providing residential driveway paving services throughout Minnesota and Western Wisconsin for more than 40 years. Contact us today to begin your consultation.