When laying out a concrete slab, what should the thickness typically be?

A typical thickness for a concrete slab is 4 inches, especially for residential applications such as driveways, patios, and floors. This thickness provides adequate strength and durability to support the weight of vehicles and furniture while allowing for proper curing and minimizing the risk of cracking.

In practical terms, the 4-inch slab thickness strikes a balance between structural integrity and cost-efficiency. Thicker slabs, like those at 6 inches or 8 inches, are generally reserved for industrial applications or where heavier loads will be present, while a thickness of 2 inches may not provide the necessary support for most residential uses. Thus, the 4-inch option is recognized as standard in most concrete laying practices.