The vast majority of concrete pools in the United States are plastered when they are built. In many areas of the United States, different types of pool coatings are used when the pool’s original plaster ages and becomes stained or rough due to years of repeated acid cleaning or poor water chemistry. So the pool coatings are applied over the old plaster. But the old plaster has to be in sound condition, meaning it may need to be patched if it has spalled or delaminated from the concrete shell below.
The pool's surface will last for many decades if your contractor uses quality materials, has proper installation methods, and maintains proper chemical levels.
Although plaster is more costly than paint, it provides excellent protection and gives your pool a classic look. The majority of pool plaster is made from cement, water, and sand. Some higher-end mixes include marble aggregate. A medium-sized pool can be refinished with plaster for as little as $7,000 to $10,000, although it is not difficult. However, the coating needs to be maintained.
replaster pool cost