It is entirely possible to apply asphalt pavement over a concrete parking lot, street or driveway. In fact, many state and government agencies routinely apply an asphalt overlay on top of a concrete roadway across the country and in Austin, Texas!
Because asphalt derives its strength and durability from a solid foundation, concrete is ideally suited for an asphalt overlay. However, like any other foundation used for asphalt pavement, the concrete needs to be in good condition before the asphalt is applied.
Concrete is typically poured in individual blocks with expansion joints between each block. If the soil beneath the concrete shifts, blocks can be lifted up or move apart. It is not advisable to apply asphalt over a concrete surface that has large gaps between the blocks or that is uneven due to movement. In addition, potholes and other significant damages to the concrete should be repaired prior to applying asphalt.
With time, cracks may form in the asphalt above the expansion joints. This is normal and is no cause for alarm. However, it is important to have these cracks filled as soon as possible as they can allow water to become trapped beneath the asphalt. This can damage the asphalt surface, especially in areas where the ground freezes in the winter, and cause extensive cracking of the asphalt.
An asphalt overlay can look attractive and function superbly for many years. Like concrete, asphalt needs to be properly maintained to reach its full life expectancy. Properly installed concrete that is in adequate condition is one of the best foundations for asphalt pavement.
Because every concrete surface is different, the final decision regarding an asphalt overlay is best left to a professional. At Alpha Paving Industries, our team members are experts at determining the feasibility of applying asphalt pavement over concrete. We are a full-service company providing pavement maintenance and installation throughout the Austin metropolitan area and Central Texas. Whether you need an asphalt overlay on your residential driveway, a parking lot striped or power washed, parking stops installed or asphalt sealcoating applied to your asphalt surface, we have the expertise to do the job right. For a free quote, submit the form found on our website, or you can call us at 512-677-9001.