How to properly overlay asphalt | Texan Paving, LLC.

Asphalt overlays are very common on old parking lots, roads and driveways. Overlays are more cost effective than complete asphalt removal and replacement.

The old asphalt pavement must be properly inspected, sometimes the asphalt is past the point of repair and it must be removed completely. If the old asphalt is not gator cracked, or full of potholes an overlay can be installed simply by cleaning and tacking the old asphalt.
Asphalt with cracks larger than 1/4" must be thermal sealed prior to installing an overlay, if large cracks are not sealed the overlay will fail and the new asphalt will also crack.
If the old asphalt has areas with gator cracks and potholes, these areas with gator cracks, and potholes must be saw cut, removed and patched before an overlay can be installed.
In most cases the areas next to the curb and gutter must be removed or milled to maintain proper drainage.
Once the parking lot, drive or road has been properly prepared the entire area where the overlay is being installed must be tacked.
After tacking the old asphalt, the new hot asphalt mix must be installed at a minimum of 1-1/2" thick, and maximum of 2" thick. If the old asphalt is being overlayed for heavy truck traffic and more than 2" are being installed the new asphalt must be installed and compacted in layers no grater than 2" of thickness each.
All sprinklers must be turned of 24 hrs prior to the overlay to achieve maximum adhesion of the new asphalt.