How High Can a Concrete Patio Be?

Most concrete patios, and other concrete slabs, are 4 inches thick. Building codes across the country usually require a thickness of 3.5 inches and compressive strength of 3,000 PSI. However, many things determine whether a concrete patio should be thicker, or incorporate rebar/reinforcement mesh.

How tall should concrete patio be?

A patio should slope away from the house at the rate of 1/8" (3mm) per running foot. Generally, a 4" (100mm) thick slab set 2" (50mm) above ground level is suitable. To ensure that the height and slope are correct, begin the excavation, layout and form construction where the patio meets the house.

How high can a concrete slab be?

For a proposed concrete slab on ground the finished floor level (FFL) is required to be 100mm above the external finished ground level (FGL) for low rainfall intensity areas such as sandy, well-draining soil. Over the first 1m of the external finished ground level the fall is required to be 50mm over the 1m setback.