Concrete used to be the "go-to" option when it comes to purchasing an inground swimming pool. Now, Fibreglass is far more popular due to its shorter construction times and lower costs with product and installation. Fibreglass pools are affordable with fast installation and are durable. Concrete, on the other hand, is a lot more expensive and installation can take up to 6 months, Plus, being concrete, it is possible to crack during earth movements.