Replacing a failed asphalt pavement with concrete promised to cut life-cycle costs for the parking lot of a church-operated warehouse facility. Even though removing the asphalt and replacing it with concrete cost 40 % more than replacing it with new asphalt, reduced maintenance costs made concrete the lowest total cost option.
But wet, poor soils bogged down equipment when construction began. To build a solid working platform, the contractor had to over-excavate and backfill, increasing the project cost. That's when the owner decided to leave the asphalt surface in place and whitetop the lot. The job showed that whitetopping can be an economical alternative to replacing worn out asphalt pavements with new concrete or asphalt pavements.