Building a lot
Asphalt or concrete for a parking lot?
Asphalt costs less to build and needs a maintenance cycle to reach its life, and concrete costs more up front and asks for little until it fails.
The numbers
- Asphalt: lower build cost, flexible, maintained on a cycle, repaired in sections.
- Concrete: higher build cost, rigid, little maintenance, repaired by the slab.
- Concrete holds up better under standing loads: dumpster pads, dock aprons, trash truck approaches.
- Asphalt tolerates ground movement better, which matters where the ground freezes.
How each one fails
Asphalt is flexible. It bends under a load and springs back, and it moves with ground that heaves. When it fails it fails gradually and in patches, which is why a section can be cut out and rebuilt without touching the rest.
Concrete is rigid. It carries load by spanning rather than by bending, so it takes standing weight far better. When it fails it fails at a joint or across a slab, and the repair is that whole slab.
Where each one belongs on the same property
Most commercial properties end up with both, and that is the right answer rather than a compromise. The lot and the drive lanes are asphalt. The dumpster pad, the dock apron and the trash truck approach are concrete, because those are the places a heavy load sits still or lands hard, and asphalt does not like either.
A dumpster pad in asphalt shows the shape of the container inside a couple of years. The same pad in concrete outlives the container.
What the maintenance looks like either way
Asphalt asks for crack filling, sealing on a cycle, and patching as areas fail. That is a small annual number that keeps a large number away.
Concrete asks for joints to be kept sealed and for deicers to be used to their own label, especially in the first winter after a pour. It is less work, and when it does need something it is a bigger single job.