Unlike fiberglass, plaster will react with pool water over the course of its lifetime, so more chemicals may be necessary to maintain proper water chemistry. To counteract this issue, add a “filler” to your plaster mix.
You won't need to resurface a fiberglass pool very often if it is high quality. Fiberglass pools can last a lifetime if they are maintained and cared for properly. A fiberglass pool resurfacing job can cost an average $7,500 in labor and parts. There are many popular finishes you will find in fiberglass pools. These can greatly impact your cost.
Vinyl pools are very popular due to their affordability. A vinyl sheet liner is a thin, flexible material that wraps tightly around the pool's surface. It seals around the deck. Vinyl is more flexible that concrete and less expensive than fiberglass.