A street overlay is a cost effective means of extending the service life of a roadway. Typically 2-inches of asphalt are applied to an existing road surface.
This is done by first milling or grinding parts or all of the existing surface of asphalt. The reason for milling is to make room for the asphalt that is to be applied.
The asphalt is applied by a asphalt paver that spreads a consistent layer of hot asphalt down on the surface. The asphalt is then rolled or compacted with the use of a steal drum roller.
Most street overlays require the use of a outside contractor do to the need of specialized equipment.