The ideal thickness for an asphalt patch should be approximately 2 inches. This depth is necessary to ensure the patch will bond appropriately with the existing surface and provide a lasting repair. In addition, adequate compaction of the underlying base material must be confirmed to guarantee that the patch will remain secure and undamaged from external elements. Proper reduction of the underlying base material must also be considered when determining the correct thickness for an asphalt patch. Failure to do so can result in uneven surfaces or premature loss of the patched area over time.