Aurora Asphalt & Sealcoating will design your addition and show you exactly what it will look like on the proposal. In some cases, a retaining wall may need to be built to support the addition. Any sod, rock, or ground material will be removed and leveled. Crushed concrete (limestone for an additional charge) will be brought in as needed to establish 4-6 inches of the base material. The base material will be compacted with a double drum vibratory roller. .Our standard driveway is paved with MN/DOT spec wear course asphalt, compacted to a thickness of 2 1/2″-3″ with a vibratory roller. Cleanup is essential in completing the job.