There are two main types of asphalt patch repairs procedures that will provide a suitable fix to most asphalt related issues — full-depth patching (peel and pave) and surface patching.
Full-depth patching involves the removal of the entire layer of pavement surface down to or including the subbase, depending on the condition of the stone base. New subbase is then installed, a tack coat is applied, and new asphalt pavement is backfilled into the patch area.
Surface patching is a more temporary fix and should only be considered for a surface that is in relatively good condition. This process does not involve the excavation of the existing surface or subbase. The asphalt is simply layered over the existing surface and feathered to match the in-place grade. In some cases, a rebate is milled into the surface, which eliminates the need to feather-edge the patch.