For people who plan on living in a home and using an in-ground swimming pool for a long time, fiberglass swimming pools are often a better value than poured concrete pools. Although the prefabricated fiberglass material is more expensive than concrete or vinyl liners in upfront installation, over time they can save homeowners money in chemical treatments, cleaning, energy costs, and repair. After considering how the pool is used, weather, soil type, and design requirements, many consumers are pleased with pools made from fiberglass.
Unlike traditional poured concrete, fiberglass swimming pools come as a pre-formed shell and are set in an excavated site. This gives them the benefit of quick installation. The interior fiberglass is sealed by the manufacturer to create a smooth, nonporous surface, which doesn't interact with the water or affect the pool's chemistry. It uses fewer harsh chemicals and requires less frequent cleaning than a concrete pool. This is important for people who don't want to scrub a pool or who have allergies to strong chemicals like chlorine.
Fiberglass swimming pools save money in other kinds of maintenance as well. Their structure doesn't develop cracks as easily as concrete, so they don't need to be resurfaced, replastered, or grouted. Even vinyl liners, which don't crack, eventually wear down and must be replaced. Fiberglass pools are particularly popular on the west coast, where earthquakes are a frequent occurrence, because they bend with the ground instead of splitting or popping. They can even withstand stray tree roots better than vinyl-lined pools.
Even with their benefits, fiberglass swimming pools aren't the right choice for everyone. They come in prefabricated styles, so while there are a wide variety of depths, shapes, and colors, they cannot be fully customized like concrete or vinyl. Fiberglass isn't ideal for certain cold-temperature climates, where homeowners must "weather" their pools by emptying them for several months, because the pools are designed to be filled to a minimum level at all times to keep the pressure inside and outside the wall even. They are not susceptible to damage from ground frost, however.
For people who are concerned about affecting the resale value of their home, it is even possible to dig up fiberglass swimming pools and move them to a new house or sell them. Most buyers are happy with a backyard that comes with a pool, however, especially one made of fiberglass, which has such low maintenance.