There are several steps involved in building a new pool. As one would expect, the first major construction step is to dig the hole. Next, a steel framework made of rebar, or reinforcing rods, is installed. The rebar helps prevent cracking and structural failure. After the rebar is installed, the rough plumbing for drains, inlets, skimmers, and lighting is installed.
Gunite, the primary component of the pool shell, is made of a mixture of concrete and water and is blown, or “shot,” onto the steel framework. To allow the gunite to properly set after it is shot and troweled, it must be watered several times a day in the summer, or once a day in the winter. Tile and coping are then installed, and the next phase of construction is the decking, which is a poured concrete or a paver on sand.
All inlet covers, drain covers, filter equipment, and pool lights are installed and wired before a finish is applied. The most popular finish for a gunite pool is plaster. The plaster, which is watertight and prevents leaking, is sprayed and troweled onto the walls and bottom of the pool. Once the plaster is in place, the pool is continuously filled to the midpoint of the tile, and a chemical start-up begins. The plaster is cured underwater and has to be brushed at least once per day for seven to ten days.