The short version
On the Wasatch Front, fiberglass usually costs less than a custom concrete pool and spends far less time under construction in your yard. Concrete wins on shape, size and diving. Both live or die on the same thing here: what the groundwater and the clay under them are doing.
| Fiberglass | Concrete (gunite / shotcrete) | |
|---|---|---|
| Published Utah prices | $60,000–$100,000 (Palmetto Pools); most projects $90,000–$140,000 (River Pools of Salt Lake City) | $80,000–$150,000+ (Palmetto Pools); and $70,000–$100,000 basic, $100,000–$150,000 mid-range, $150,000–$300,000+ luxury (Palmetto's cost guide) |
| Our price | Around $150,000, including the equipment, deck and automatic safety cover | We don't build concrete pools |
| Time under construction | Days to about five or six weeks once the shell arrives (Latham; River Pools) | 8–12 weeks once construction starts (Palmetto); "60 days or less" (Packman's); 3–6 months nationally (Blue Haven) |
| Why | The shell is finished in a factory | About four weeks of recommended moist curing before plaster, then a 28-day plaster startup |
| Shape and size | Whatever the molds make; about 16 ft wide and 40 ft long at most | Any shape and size |
| Surface | Smooth gelcoat. Can fade or chalk over time, and Latham's warranty excludes fading | Plaster or pebble finish, needs resurfacing over the pool's life |
| Diving | Most shells rated no-diving; one deep model (Synergy Grand) rated for it | Can be built to any diving envelope |
| If groundwater lifts it | Sometimes lifted, re-bedded and reset | Usually demolished and rebuilt |
Prices are what each company publishes, and each counts different things in its number. They are not quotes for your yard.
Cost: usually less, not always by a fixed amount
The published ranges overlap, so be wary of anyone promising a set saving. What we can say is what we see: customers have brought us concrete quotes of $250,000 to $300,000, and our fiberglass pools are coming in around $150,000, including the equipment, deck and automatic safety cover. Part of the difference: the shell is built in a factory, not in your yard. The full cost breakdown is here.
Time: weeks in the yard, months on the calendar
A careful concrete pool can't be rushed. The shotcrete industry recommends keeping the shell moist for about four weeks before plaster, and plaster has its own 28-day startup. A fiberglass shell skips both.
That doesn't make fiberglass instant. Drawings, the city permit and shell delivery still come first, which is why we tell customers to plan on about three months from signing to swimming. The difference is that most of that time happens on paper, not in your backyard.
Utah winters
You'll read that fiberglass flexes through freeze-thaw and concrete cracks. That claim comes almost entirely from fiberglass makers, and properly built, winterized concrete pools survive cold climates all the time. Our view: in a Utah winter, how a pool is drained, closed and covered matters more than what it's made of. Every MP pool gets an automatic safety cover, and winterizing is part of the handover walk-through.
Where fiberglass falls short
- Size and shape. About 16 ft wide is the road limit. If you want a 20-ft-wide pool or a shape no mold makes, build concrete.
- Groundwater. Latham's warranty is void if water collects around the shell, and an emptied shell can lift. On wet lots the drainage plan is non-negotiable.
- Installation matters. A shell backfilled the wrong way can bow, and its walls can end up out of square for a cover. It has to be set and backfilled the way the maker's guide says.
- The finish. Gelcoat can fade or chalk over the years, and that's not covered by the warranty.
- Access. The shell arrives on a truck and goes in by crane, so the crane has to reach your yard.
Where it shines
- A predictable schedule with fewer outside crews
- A smooth gelcoat finish instead of plaster
- Built-in tanning ledges, benches and even spas, molded into the shell
- Usually a lower price than custom concrete on the Wasatch Front