When determining what type of inground pool to build, you have three options to consider: gunite, fiberglass or vinyl. Each pool type has unique benefits and considerations. When determining what type of inground pool to build, you have three options to consider: gunite, fiberglass or vinyl. Each pool type has unique benefits and considerations. A “concrete mixture” that forms a thick, durable pool shell that will last for years to come. Fiberglass pools can be installed in as little as three...