*All patching processes including mill and patch, skin patch, and remove and replace processes are endorsed by the Minnesota Department of Transportation. It's important to use the proper method for the specific area. Most lots require a combination of these strategies. Bottom line, under-specifying or over-specifying the method and quantity of the patching will cost additional money without additional benefit.
**An Overlay is both a maintenance and rehabilitation correction. It extends the life of the underlying asphalt and also improves the asphalt's structure. An asphalt overlay is required when it's too late to patch and seal, but too soon to perform a complete reconstruction. In other words, removing and replacing the entire asphalt surface.
Overlays are less expensive than reconstruction - they require less preparation time AND less asphalt to achieve the same result.