What is Paving Resurfacing?
Asphalt paving resurfacing is the installation of a new asphalt layer over your existing pavement. It is also known as asphalt overlay, an overlay or pavement overlay. The new layer ranges in depth from 1.5 inches to 2 inches. However, pavement reconstruction involves the installation of both the top pavement overlay and the subgrade asphalt layers.
Resurface your driveway or parking lot if the surface becomes oxidized heavily, but the subgrade layer or base stays in a good, stable condition. Core-testing can help you ascertain the condition of the subgrade layer and determine its condition.
Reconstruction is more cost-effective and efficient than an overlay in case of alligator cracks or extensive damage. Pavement overlay has an average lifespan of eight to fifteen years based on a number of factors. However, a completely reconstructed pavement can go for up to fifteen to twenty years based on various factors.
Winter harshness, weather patterns, new asphalt layer thickness, number of heavy trucks using the pavement, subgrade layer condition before resurfacing and proper care of the new surface through regular maintenance can increase the lifespan of your newly resurfaced or completely reconstructed pavement.
Permit new traffic on your newly resurfaced driveway or pavement at least after a day to avoid damaging the new asphalt layer. It’s also important to avoid sharp turns on the wheels of parked vehicles. Avoid asphalt resurfacing your pavements in winter to avoid cold seams and deterioration of your driveway or pavement.
What is an Asphalt Overlay?
Also known as pavement, asphalt, asphalt concrete or blacktop, an asphalt overlay is a composite material often used to surface parking lots, roads, embankment dams and airports. It is an aggregate of minerals bound and compacted together.
It’s often made from a mixture of bitumen, gravel, sand, crushed rock or slags. Asphalt overlay gives pavements the capability to distribute traffic loads prior to arriving at the level of formation. Asphalt mixtures are produced at hot, cold or warm temperatures to give them varying properties.
Asphalt overlay is made from hot asphalt mixes to give your parking the flexibility it needs to accommodate the underlying surface imperfections. It is durable, attractive and saves costs and time in the long-term.
Is Asphalt Milling Required before an Overlay?
Resurface your pavement under proper drainage conditions. Does your driveway or parking lot drain well? How will a new asphalt layer impact your existing parking lot drainage system? It’s important for water to drain properly in your parking lot.
Therefore, make sure its slope is at least 1%, translating to about 1 inch of fall over every 10 feet of your driveway or pavement. Install the new asphalt at a similar level as the concrete to promote drainage and prevent water from getting trapped between the concrete and asphalt.
Mill the existing asphalt’s edges to the adjacent concrete level to improve the drainage of your pavement, explaining why asphalt milling is required before an overlay. Otherwise, the new asphalt layer is bound to sit at about 1.5 to 2 inches higher than concrete. As a result, your pavement is prone to water damage, posing a fall or trip hazard for people using your driveway or parking lot.
Contact us to find out more asphalt overlay and how our paving asphalt resurfacing services can help improve your old pavement
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