There is no one definitive answer to this question. Pool decks can be anywhere from 4 inches to 12 inches thick, depending on the loads they will be carrying and the climate conditions in which they will be used. In general, a thicker deck is better able to withstand heavy loads and extreme weather conditions.

There is no one-size-fits-all answer to this question, as the thickness of a concrete pool deck will vary depending on the climate, soil type, and other factors. In general, however, a minimum thickness of 4 inches is recommended.