What Are the Distinctions In between Gunite, Fiberglass, and Vinyl Pools? Gunite pools are concrete pools that are built on-web page and usually takes up to 2 or 3 months to construct. Fiberglass pools are prefabricated ones built off-web page that could be set up within two to 4 weeks. https://www.behance.net/gallery/152731671/How-To-Hire-A-Pool-Contractor