If you're a North Texas homeowner starting to research backyard pools, you've probably run into the fiberglass versus gunite debate pretty quickly. Both are popular, both can look beautiful, and both have enthusiastic supporters. But they're genuinely different products, and the right choice depends on your priorities, your budget, and a factor that most pool websites won't mention until you press them: the Collin County soil underneath your yard.
We build gunite pools at El Dorado Pools, so we have a perspective here. But we also want to give you an honest comparison so you can make a confident decision. If a fiberglass pool is the right fit for your family, we'd rather you know that upfront than find out five years after installation.
Let's walk through everything that matters.
What Is a Fiberglass Pool?
A fiberglass pool is a pre-manufactured shell made from layers of fiberglass and resin, molded in a factory and shipped to your property as a single, complete unit. The manufacturer creates a mold in a specific shape and size, the shell is produced, and then it gets trucked to your home and dropped into a pre-dug hole by crane.
The gelcoat surface on the interior is smooth to the touch and comes in a range of colors. From a distance, a finished fiberglass pool can look stunning. Installation is faster than gunite because much of the work was done at the factory before the shell ever left the warehouse.
Popular fiberglass manufacturers like Latham and San Juan offer dozens of mold options, and many of their shapes are genuinely attractive. The limitation, as we'll get to, is that you're choosing from what already exists rather than designing from scratch.
What Is a Gunite Pool?
Gunite (also called shotcrete or concrete pool) construction is a completely different process. Instead of arriving as a pre-built shell, a gunite pool is designed and built on your property from the ground up. A steel rebar framework is assembled in your yard, then high-pressure pneumatic equipment shoots a mixture of cement and sand over the rebar structure to form the shell. Once that cures, the surface is finished with plaster, aggregate, or pebble material in whatever color and texture you choose.
Because nothing about a gunite pool is limited by a factory mold, the shape, depth, size, and layout are completely open. Want a 40-foot lap section with a beach entry on one end and a spa on the other? You can do that. Want a negative edge that seems to flow into the treeline behind your property? That's possible too. The design lives on paper first, then gets built exactly as drawn.
This is the type of pool we build at El Dorado Pools, and it's what most custom pool builders in McKinney and the greater DFW area specialize in.
Installation Timeline: Fiberglass Is Faster
If speed matters to you, fiberglass wins this round clearly. A fiberglass pool can go from signed contract to water in the pool in roughly 3 to 6 weeks under good conditions. The shell is already made. The excavation happens, the shell drops in, plumbing and electrical get connected, and you're swimming.
Gunite pools take longer because every step happens on-site. Excavation, rebar installation, gunite application, curing time, tile and coping work, interior surface application, another curing period, and then startup and water chemistry balancing. A typical gunite pool project in McKinney runs 10 to 14 weeks from breaking ground to your first swim. Complex designs with water features, spas, and automation can run longer.
If you're reading this in April and hoping to swim by Memorial Day, fiberglass is more likely to make that timeline. If you're planning now for next spring or summer, the gunite timeline is very manageable, and what you gain from the extra weeks is a pool built exactly the way you want it.
Cost Comparison: What You're Actually Paying For
Fiberglass pools typically have a lower upfront cost than gunite pools of similar size. A basic to mid-range fiberglass pool installed in North Texas might run $55,000 to $85,000 including excavation, plumbing, electrical, decking, and startup. The shell itself is a known, manufactured cost, which keeps pricing more predictable.
Gunite pools in the McKinney and Collin County area typically start around $70,000 for a straightforward build and can run $150,000 or more for a fully customized pool with a spa, water features, tanning ledge, automation, and premium interior finish. For a realistic breakdown of what different configurations cost, take a look at what a custom pool costs in McKinney in our detailed 2026 guide.
The upfront price gap is real and worth acknowledging. But there are a few things that shift the long-term value equation worth understanding.
Fiberglass pools will eventually need gelcoat repairs or a full resurfacing, which typically runs $10,000 to $20,000 depending on the scope of the work. Gunite pools also require resurfacing over time, but your options for interior finishes are broader, more durable choices are available, and the process is well-established. You can read more about that in our overview of pool resurfacing options for Collin County homeowners.
Gunite pools also have a longer lifespan when properly maintained. A well-built gunite pool with good ongoing care can last 50 years or more. Fiberglass shells are durable but have a more defined lifespan, often cited at 25 to 30 years before major refurbishment is needed.
Customization: The Biggest Practical Difference
This is where gunite separates itself most clearly for homeowners who have a specific vision for their backyard.
With a fiberglass pool, you choose from the manufacturer's available molds. There might be 30 or 50 or even 100 shape options, and many of them are nice. But if none of the molds match the shape of your yard, the way your house sits on the lot, or the specific features you want, you're compromising on the design. You can't get a truly custom shape. You can't change the depth configuration mid-shell. You can't add a tanning ledge to a mold that wasn't designed with one.
With gunite, the design starts on paper and reflects exactly what you want. Every dimension, every depth transition, every curve, every feature is specified upfront and built to those specs. Tanning ledges, swim-up bars, grotto features, vanishing edges, attached spas, grottos, deck jets, scupper water walls, large beach entries for young children, spa spillways, the list goes on. All of it is available because the pool is being built from scratch rather than pulled from inventory.
For families with specific backyard geometry, unique design goals, or a list of features they want integrated, gunite is almost always the right answer.
North Texas Clay Soil: The Factor That Changes the Conversation
Here's the part of the fiberglass versus gunite conversation that doesn't get enough attention when you're comparing pools online, and it's arguably the most important factor for homeowners in McKinney, Frisco, Allen, Prosper, and the rest of Collin County.
North Texas sits on expansive clay soil. This soil is called expansive because it does exactly that. It expands when wet and contracts when dry, and in North Texas, we cycle between heavy rain seasons and drought periods that drive significant ground movement. The soil shifts. It heaves. It puts lateral pressure on anything buried in it.
Fiberglass pool shells are designed to flex, which is presented as an advantage for handling soil movement. And to a degree, that's true. But the problem is that the gelcoat surface coating on a fiberglass pool doesn't flex as readily as the shell beneath it. When North Texas clay soil goes through a significant expansion and contraction cycle, fiberglass pools can develop gelcoat cracks and "spider cracking" patterns that compromise the surface and eventually allow water to seep into the fiberglass layers underneath. This is called osmotic blistering and it's a known issue in regions with expansive soil.
Additionally, because a fiberglass shell is one rigid unit, any significant soil movement can cause the shell to shift position in the ground. This can result in uneven coping, cracked decking around the pool, and plumbing connections that are under stress. Repairs in these situations are more complex and more expensive than a standard repair on a gunite pool.
Gunite pools handle North Texas soil movement better for a structural reason. A properly engineered gunite pool shell has a steel rebar framework that's designed by an engineer for the specific soil conditions on your site. The shell bonds with the earth around it differently than a fiberglass shell sitting in a hole. While no pool is immune to the effects of expansive clay soil, a well-designed gunite pool on a properly prepared site has a stronger track record in the DFW area for managing the ground movement that comes with Collin County's soil profile.
This is why most experienced pool contractors in the McKinney area, including our team at El Dorado Pools, favor gunite for long-term performance in North Texas conditions.
Surface Differences: Gelcoat vs. Plaster and Pebble
The interior surface of a pool affects how it looks, how it feels underfoot, how easy it is to keep clean, and how long it lasts before needing attention.
Fiberglass pools have a gelcoat surface that's applied during manufacturing. It's smooth and feels good on skin, which is a genuine benefit. The challenge is that gelcoat is a relatively thin coating over the fiberglass shell. Over time it can fade, stain, and chalk, particularly in the intense UV environment of a Texas summer. Fiberglass pools tend to show calcium and mineral deposits more visibly on their surfaces. Acid washing, which is a routine maintenance procedure on gunite pools, is not recommended on fiberglass because it damages the gelcoat.
Gunite pools are finished with a variety of interior surface options including standard white plaster, colored plaster, quartz aggregate finishes, and premium pebble aggregate surfaces like PebbleTec or Diamond Brite. Pebble surfaces are very durable, naturally textured, resistant to staining, and provide a lifespan of 15 to 25 years before resurfacing. They also tend to hold their color well even through years of Texas sun.
The tradeoff is texture. A pebble finish is rougher underfoot than gelcoat. Most homeowners adapt quickly, but if you have young children who spend a lot of time walking on the pool floor and steps, it's worth considering.
Long-Term Maintenance Differences
Day-to-day pool maintenance is similar regardless of pool type. You're still testing chemistry, running the pump, skimming, brushing, and vacuuming. But there are some meaningful differences in long-term care.
Fiberglass pools are often marketed as lower-maintenance because the gelcoat surface is less porous than plaster and therefore doesn't harbor algae as readily. There's truth to that. However, fiberglass surfaces require specific chemical ranges to avoid damage. Fiberglass manufacturers typically specify tighter pH ranges and warn against certain algaecides and high-copper treatments that can stain the gelcoat. You have a little less flexibility in how you treat chemistry issues.
Gunite pools with plaster or pebble surfaces are more forgiving of aggressive chemical treatment because the surface can handle it. When you have a green pool situation after a storm or an equipment failure, you have more treatment options with a gunite pool. Our team handles a lot of pool recovery situations in McKinney and the surrounding area, and gunite pools are generally easier to bring back to balanced water quickly.
Professional maintenance matters for both pool types. Our pool maintenance services cover weekly care, chemical management, equipment inspections, and seasonal service for both fiberglass and gunite pools throughout the McKinney area.
Resurfacing and Long-Term Repair
Every pool will eventually need some form of interior surface work. Understanding how that process differs between fiberglass and gunite is worth knowing before you commit to a pool type.
Gunite pool resurfacing is a well-established process. The old plaster or pebble surface is chipped out, the shell is inspected and any structural repairs are made, and a new interior surface is applied. You can change colors. You can upgrade from plaster to pebble aggregate. The process is predictable, most pool contractors can do it, and pricing is relatively consistent in the DFW market.
Fiberglass pool resurfacing is more specialized. You can't simply apply new plaster to a fiberglass shell the way you would with gunite. The options include gelcoat restoration (applying a new gelcoat layer), applying a quartz plaster coating specifically designed for fiberglass, or in severe cases, draining and replacing the interior with a pool paint or specialized coating. The process requires contractors who specifically work with fiberglass, and the long-term durability of refinished fiberglass varies. Our article on pool resurfacing options goes into more detail on what's available for North Texas pools.
Resale Value
Both pool types add value to a North Texas home. In the McKinney and Collin County real estate market, an outdoor pool is generally viewed positively by buyers, particularly given the long Texas swim season that runs from roughly May through October.
Custom gunite pools tend to photograph and present better in real estate listings because they can be designed to suit the specific lot and home architecture. A well-designed custom pool that integrates with outdoor living spaces, features clean landscaping, and shows well is a significant selling point.
The condition of the pool surface matters too. A fiberglass pool with faded or cracked gelcoat can actually work against a sale if buyers perceive it as a near-term expense. A gunite pool with a fresh pebble surface is an easier conversation in a transaction.
That said, a clean, well-maintained fiberglass pool in a popular shape and color is still a positive for most buyers. Neither pool type is a liability as long as it's properly maintained and in good condition at the time of sale.
Tanning Ledges and Sun Shelves
Tanning ledges, sometimes called Baja shelves or sun shelves, are one of the most popular pool features requested by North Texas homeowners right now. It's easy to see why. A shallow, flat section of the pool at 9 to 12 inches of depth is perfect for lounge chairs, for young kids to splash safely, for pets who want to be near the water, and for adults who want to soak in the sun without actually swimming.
Both fiberglass and gunite pools can have tanning ledges, but there's an important distinction. With a fiberglass pool, the tanning ledge has to be part of the original mold. You can't add one to a shell that wasn't designed with it. With gunite, the tanning ledge is part of the design from the beginning, and you have full control over the dimensions, the depth, and how it connects to the rest of the pool. You can size it generously enough for two full-length lounge chairs, or keep it smaller as a splash pad area for kids.
What to Ask Your Pool Contractor
When you're meeting with pool builders in the McKinney or North Texas area, here are the questions worth asking regardless of which direction you're leaning:
- How does your company handle soil testing or geotechnical considerations before the pool design is finalized?
- What warranty do you offer on the shell, the surface, and the equipment?
- If you build fiberglass pools, what's your track record on gelcoat issues in this soil environment?
- If you build gunite pools, what engineering specifications are used for the rebar framework?
- What interior surface options do you offer and what are the lifespan expectations for each?
- How do you handle the plumbing connections at the pool shell to allow for soil movement?
- What does your post-construction support look like if issues arise in the first year or two?
A contractor who's worked in Collin County and the DFW area for years should be able to speak to these questions directly and without hesitation. If the answers feel vague or rehearsed, keep shopping.
Frequently Asked Questions
Can fiberglass pools crack in North Texas soil?
Yes, they can. The fiberglass shell itself is flexible and designed to handle some ground movement, but the gelcoat surface coating is more rigid. In North Texas's expansive clay soil, significant moisture cycling can cause gelcoat cracking, surface blistering, or in more severe cases, movement of the shell itself. This doesn't mean all fiberglass pools fail in North Texas, but the risk is higher here than in regions with more stable soil.
Do gunite pools require more maintenance than fiberglass?
The day-to-day maintenance routine is similar for both pool types. Gunite pools with plaster surfaces require brushing a few times per week initially to cure the surface properly, and plaster surfaces need resurfacing on a longer cycle, typically every 10 to 20 years depending on the finish. Fiberglass pools require less brushing and can be slightly more algae-resistant due to the smooth non-porous gelcoat. However, fiberglass pools require stricter chemical parameters to protect the surface, which requires more careful water management.
How long does a gunite pool last in North Texas?
A well-built gunite pool with proper maintenance and timely resurfacing can last 50 years or more. The shell itself doesn't wear out. What gets replaced over time is the interior surface, which is a predictable maintenance cost rather than a structural issue.
Is fiberglass always cheaper than gunite?
Upfront, fiberglass pools are typically less expensive for a comparable size. However, a basic gunite pool and a mid-tier fiberglass pool aren't always dramatically different in price. The gap widens when you want custom features that can only be built into gunite. Long-term, the total cost of ownership depends heavily on surface maintenance schedules and any soil-related repair costs, which are more of a concern with fiberglass in this region.
What pool sizes are available in fiberglass?
Fiberglass pools are limited by what can be manufactured, transported by truck, and navigated through residential streets. Most fiberglass shells max out at around 16 feet wide and 40 feet long, with some larger options available at a higher cost. If you want a pool wider than that, or a truly large pool for lap swimming or entertaining, gunite is your only practical option.
Which pool type is best for McKinney, TX?
For most homeowners in McKinney and Collin County who want a long-lasting, custom pool that performs well in our soil environment, gunite is the stronger choice. The ability to customize the design to your specific lot and needs, combined with the structural advantages in expansive clay soil, makes it the preferred option for most custom pool projects in this area. That said, if you're working with a tighter upfront budget and happy with an existing mold shape, fiberglass can absolutely work and can look great. The right answer depends on your specific situation.
Ready to Talk About Your North Texas Pool?
At El Dorado Pools, we've been building custom gunite pools in McKinney, Collin County, and throughout the DFW area for nearly two decades. We understand the soil. We understand the climate. And we know how to design pools that hold up through Texas summers, surprise freezes, and everything in between.
We're happy to have an honest conversation about whether a custom gunite pool is the right fit for your backyard, your budget, and your goals. No pressure, no sales pitch. If another pool type is a better fit for your situation, we'll tell you that.
Call us at (214) 945-6000 or send us a message to schedule a free consultation. You can also request a free quote online and we'll reach out to set up a time to visit your property and walk through the options together.
We look forward to helping you build something you'll love swimming in for years to come.