Overlay

 

One or more lifts (layers) of new hot mix asphalt placed over existing pavement without removing the old asphalt surface. The process of overlaying existing asphalt includes thoroughly cleaning the surface and applying a layer of tac oil to bond the new asphalt to the old asphalt. Once the surface has been prepped, a new layer of hot mix asphalt is installed and compacted. Depth of overlays will vary depending on the particular situation. This approach is best suited for