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Pervious concrete should be between 4 and 8 inches thick to drain water properly. Surfaces like parking lots and driveways should be at least 6 inches thick to accommodate the weight of vehicles, while patios and walkways may be poured between 4 and 6 inches thick. There’s no standard for pervious concrete thickness, but in most cases, the more weight the surface will need to hold, the thicker it should be.

Poured concrete should be set and hard to the touch within 24 to 48 hours, although it depends on the humidity in the air, the thickness of the concrete, and the type of concrete. It’s best to leave concrete to set for three days before exposing to foot traffic or stress. Concrete takes between 20 and 30 days to cure and reach its peak strength, so for foundations and retaining walls, plan to wait about a month before placing any load on your concrete.

Resurfaced concrete can last anywhere from eight to 15 years on average. Just how long your resurface concrete driveway lasts depends on how often you seal the concrete, the amount of traffic, how well the concrete resurfacer was applied, and even the soil quality. Poor soil that led to premature cracks in your existing concrete can quickly lead to even more cracks and problems if you don’t fix the root cause of the cracked concrete.

A properly installed 6-inch concrete slab, mixed and cured under the right conditions, can support about 3,000 pounds concentrated over a single square foot without buckling. Conversely, concrete pavers can handle around 8,000 pounds per square inch when laid over a solid, well-compacted base.