Is The Thickness Of Your Asphalt Surface A Big Deal?

Is The Thickness Of Your Asphalt Surface A Big Deal?

Planning a new pavement project in Tampa, Florida? As a property owner, you need to know a few things about asphalt paving for better outcomes with pavement construction.

There are several things involved when laying new asphalt, such as subgrade preparation and drainage. The thickness of the asphalt also plays a significant part.

At the Resource Pavement Group, we offer custom paving solutions for residential and commercial properties. Click here to learn more about our services. 

In today’s article, we will discuss the importance of asphalt thickness during driveway, road, or parking lot construction. 

Start With The Soil

Before determining the right asphalt thickness for your pavement, you need to know the soil type that will serve as the base for your driveway or parking lot. The type of soil is critical for the sturdiness of the pavement.

Usually, gravelly, rocky soil is ideal for pavement construction. This is because gravelly soil offers excellent drainage, among other benefits. On the other hand, clay or loam soil is notorious for poor drainage and may need to be replaced. In short, soil inspection is necessary to determine how thick the asphalt layers will be.

Check The Sub-base

Moving on, the type of sub-base is also an important factor, whether you are working with a compacted base or an aggregate substance. Without subbase preparation and the right asphalt thickness, your pavement will deteriorate soon and call for significant repairs or complete replacement. 

A granular base aggregate requires 6 to 8 inches thickness, in the case of residential driveways. In comparison, around 8 inches are usually sufficient for commercial applications. The driveway will also need an additional 2 to 3 inches of material above this layer. In contrast, a commercial pavement will use about 3 inches for the upper layer. 


To decide on the thickness of asphalt, you also need to know what the pavement will be used for. It’s easy to understand that a residential driveway will not require the same thickness as a road. 

If you expect light traffic on your pavement, 3 inches of hot mix asphalt is sufficient over a 6-inch aggregate base. Hot mix asphalt is the most commonly used asphalt mix, heated up to 3000 to 3500, and paved while it is still hot. 

For a heavy-duty parking lot with an aggregate base, go for 6 inches of hot mix asphalt over a 3-inch aggregate base. 

If you expect heavy traffic (such as trucks) on your pavement, you should go with a 2-inch finish over a 2-inch binder. If your pavement is reserved for heavy-duty commercial vehicles, go for 7.5 inches of hot asphalt on the subgrade for extra durability. 

Hire The Right Contractor

Now that you know why asphalt thickness matters, it is essential that you hire the right contractor for the paving job. Many contractors out there are inexperienced, unqualified, or downright frauds, cutting costs by layering asphalt thinly.

If you reside in Tampa, Floridaclick here to reach out to Resource Pavement Group. We will provide honest, reliable, and component services at each stage of your paving project.