The advantage of asphalt is you do not always need to tear it out. If possible, you can resurface the existing layer. However, if doing an overlay will cause drainage issues, you will need to strip away the asphalt to the original stone base- this will allow the drainage to stay positive.
As stated above this is done when needed to maintain drainage.
If you are adding new areas, we typically dig 8 inches, add 6 inches of DGA stone and pave with 2 inches of compacted asphalt surface.
This includes grinding down or milling the asphalt at transitional areas, like an apron of a street, in order to give the asphalt depth and allow a smooth transition.
This is the liquid that bonds the new and the old asphalt on an overlay.
This is asphalt placed in low or uneven areas prior to the overlay.
This is the amount of compacted asphalt we will apply on your job. Our standards are 1.5 inches on an overlay and 2 inches of compacted asphalt surface on new stone for a typical residential home driveway. On farm roads or other areas with heavy duty traffic, additional thickness may be required.