In order to build a durable asphalt driveway several steps must be taken. First would be the sub-base. The types of material used for a sub-base vary by region but the most commonly used sub-base for laying an asphalt driveway is Recycled Concrete Aggregate (RCA). RCA allows for the proper compaction as well as enough drainage to prevent ice from forming and cracking the driveway. Recommended thickness for the RCA sub-base is 4-6 inches after the proper compaction is completed. Ideally, the sub-base should sit for 7-10 days to ensure natural settling and compaction.
After the base is fully compacted, you are ready for asphalt. Depending on the amount of traffic and/or the size of the vehicles that will be driving on the surface, 2-3 inches of asphalt should then be laid. To ensure proper compaction of the blacktop, a roller weighing anywhere from 1 ton to 3 tons should be used.
Finally, you must provide enough slope or pitch for draining water off and away from the driveway. Water should never be allowed to puddle on the surface because that will lead to a shorter surface life and increase the chance of the driveway cracking in the wintertime.