When it comes to installing a backyard pool, one of the most critical decisions you’ll face is choosing the right material. The two most popular options are fiberglass and gunite pools. Both offer distinct advantages and drawbacks, and your choice will ultimately depend on your budget, design preferences, maintenance expectations, and long-term goals. This article provides a comprehensive comparison between fiberglass and gunite pools, so you can make an informed decision tailored to your lifestyle and needs.
Understanding Fiberglass and Gunite Pools
Before diving into a head-to-head comparison, let’s first understand what each type of pool entails.
What is a Fiberglass Pool?
A fiberglass pool is made from a single shell of fiberglass-reinforced polymer that’s manufactured off-site. This shell is then delivered to your backyard and installed in a prepared hole. Once installed, the surrounding structure is reinforced with concrete and connected to the filtration system.
Fiberglass pools are known for their smooth surface, fast installation time, and low maintenance. They come in a variety of pre-designed shapes and sizes, offering convenience for homeowners who want a pool without enduring months of construction.
What is a Gunite Pool?
Gunite pools, often referred to as concrete pools, are built on-site using a method that sprays a dry concrete mix through a hose, which is then activated with water at the nozzle. This allows for a high degree of customization, as the structure can be molded into virtually any shape or size.
Once the gunite shell is set, it’s typically finished with plaster, tiles, pebbles, or other decorative coatings. Gunite pools are highly durable, offer unlimited design flexibility, and can be equipped with custom features like waterfalls, spas, and intricate tiling.
Pros and Cons of Fiberglass Pools
Choosing a fiberglass pool comes with a unique set of benefits and drawbacks. Let’s break them down:
Pros of Fiberglass Pools:
- Quick Installation: Fiberglass pools can be installed in as little as two to three weeks due to their pre-manufactured nature.
- Low Maintenance: Their smooth surface is resistant to algae, requiring less chemical use and brushing compared to concrete surfaces.
- Cost-Effective: Fiberglass pools often cost less upfront than gunite pools, especially when factoring in labor and materials.
- Durability: With proper care, a fiberglass pool can last up to 25–30 years without major resurfacing.
Cons of Fiberglass Pools:
- Limited Design Options: You’re confined to the shapes and sizes produced by the manufacturer.
- Transportation Constraints: The size of the pool is limited by transportation logistics; extremely large or uniquely shaped pools may not be feasible.
- Installation Requirements: Fiberglass pools are heavy and require precise installation to prevent shifting or cracking, particularly in areas with unstable soil.
Pros and Cons of Gunite Pools
Gunite pools bring their own set of advantages and disadvantages that make them appealing to specific types of homeowners.
Pros of Gunite Pools:
- Complete Customization: You can design a pool in any shape, depth, or style.
- Longevity: With proper maintenance, gunite pools can last 50 years or more.
- Suitability for Hilly or Sloped Yards: Gunite’s versatility makes it ideal for more complex landscapes.
Cons of Gunite Pools:
- High Initial Cost: Gunite pools are typically the most expensive option due to labor and materials.
- Long Installation Time: Most projects take 3–6 months from start to finish.
- Maintenance Intensive: The porous nature of the plaster finish can attract algae, requiring more frequent cleaning and chemical balancing.
Comparing Cost: Fiberglass vs. Gunite
When evaluating which pool type is better for your budget, it’s important to consider not just the initial costs but also the long-term expenses of ownership.
Initial Cost
| Pool Type | Average Cost Range (including installation) |
|———-|———————————————|
| Fiberglass | $40,000 – $80,000 |
| Gunite | $50,000 – $100,000+ |
Gunite typically costs more upfront. This is largely due to labor-intensive design and construction, which involves steel reinforcement, spraying the dry mix, and extensive finishing work.
Long-Term Maintenance and Repair Costs
While gunite pools may seem like the better long-term investment due to their durability, their ongoing maintenance costs can be significantly higher. Fiberglass pools require fewer chemicals, less frequent brushing, and almost never need resurfacing. Gunite pools need resurfacing every 7–10 years and require more attentive chemical balancing due to their porous surfaces.
Additionally, fiberglass pools are less likely to experience issues like cracks caused by improper curing or shifting soil, which are potential concerns with gunite pools.
Design Flexibility: Fiberglass vs. Gunite
If you have a specific vision for your backyard water feature, the type of pool you choose will significantly affect your design possibilities.
Customization Options
Gunite pools offer virtually unlimited design flexibility. You can create:
- Free-form shapes
- Incorporate waterfalls, rock features, and diving rocks
- Custom-built spas and tanning ledges
Fiberglass pools, by contrast, are limited to manufacturer designs. However, many companies now offer semi-custom options that allow for minor modifications in size, color, and features like LED lighting or built-in benches.
Aesthetic Appeal
Gunite pools can be finished with a variety of high-end materials such as quartz, glass beads, or natural stone tiles. This makes them ideal for upscale, personalized aesthetics.
Fiberglass pools, with their one-piece shell finish, typically provide a smooth, glossy look that’s less customizable, but often more consistent in appearance. The gel coat finish can mimic the look of high-end materials, though it doesn’t offer the tactile experience of real tile or stone.
Best For
- Gunite: Homeowners who want a fully customized, luxury, or landscape-integrated pool.
- Fiberglass: Those who desire a functional, lower-maintenance pool with a streamlined, modern finish.
Maintenance and Durability
The ongoing upkeep of your pool can significantly affect your lifestyle and available free time. Let’s compare the two options in this area.
Surface Maintenance
Fiberglass pools have a smooth, non-porous gel coat finish, which makes them highly resistant to algae growth. As a result, homeowners spend less time scrubbing and less on chemicals.
Gunite, covered in traditional plaster or newer finishes, is more porous. This increases the likelihood of algae development, especially in areas that receive less water circulation or are shaded.
Water Chemistry Management
Maintaining proper water balance is critical in both pool types, but fiberglass pools tend to be more forgiving if the chemistry fluctuates slightly. Gunite pools require more precise chemical management to avoid scaling, staining, or etching of the plaster.
Structural Integrity and Repairs
Fiberglass pools can crack if not properly installed over a well-prepared base. However, once installed, they are generally stable and do not require recoating or resurfacing.
Gunite pools can develop structural cracks if they are not properly reinforced or if soil conditions shift. Resurfacing and crack repairs are part of regular maintenance cycles for concrete pools.
Installation Time and Process
Time can be as important as money when planning a pool installation. If you want to start using your pool as soon as possible, the installation timeline may sway your decision.
Time Requirements
Fiberglass pools can be installed in 2–3 weeks once permits are obtained. The process includes site excavation, delivery of the shell, backfilling, and setting up the mechanical systems.
Gunite pools typically take anywhere from 3 to 6 months to complete. Here’s a quick breakdown of the installation phases:
- Excavation and forming the pool shape
- Steel rebar installation
- Gunite spraying and curing
- Plumbing and electrical work
- Decking and tile installation
- Final finishes and water fill-up
This timeline includes curing periods, which are necessary to ensure the strength and longevity of the concrete.
Disruption to Your Yard and Home
The shorter installation period for fiberglass pools means less noise, dust, and yard disruption. Gunite pools require a variety of trades and more hands-on construction, which can disrupt your daily life for a few months.
Resale Value of Fiberglass and Gunite Pools
Adding a pool can increase your home’s value, but the type of pool you install can influence the return on investment.
Fiberglass Pools
Fiberglass pools can boost resale value because they are seen as low-maintenance, quick to install, and durable. In suburban neighborhoods, where families are looking for an easy, clean backyard option, a fiberglass pool is often a selling point.
However, in high-end real estate markets, a fiberglass pool may not have the same luxurious appeal as a custom-designed gunite pool.
Gunite Pools
Gunite pools, especially those with high-end finishes and custom features, tend to add the most value in upscale neighborhoods. A well-designed gunite pool can complement luxury homes and even serve as the central focal point of landscaping.
In markets where luxury features drive buyer interest, the gunite pool is often viewed as a premium asset.
Environmental and Safety Considerations
Modern homeowners are increasingly aware of the environmental impact of their choices, as well as the safety concerns associated with backyard pools.
Environmental Impact
Fiberglass pools use fewer chemicals and water overall thanks to their algae-resistant surface. This makes them a more eco-friendly option, especially in drought-prone regions.
Gunite pools tend to require more frequent chemical use and periodic draining for resurfacing, which can be resource-intensive. However, newer finishes like quartz and glass beads can reduce chemical usage compared to standard plaster.
Safety Aspects
Both fiberglass and gunite pools can be made safe with proper fencing, safety covers, and alarms (where required by law). Fiberglass pools may offer a smoother, slip-resistant surface that can improve safety for young children or elderly users. Gunite surfaces, particularly textured finishes like pebble tech, can be rougher underfoot.
Which Pool Is Right for You?
To help you determine whether fiberglass or gunite is the better option for your home, let’s weigh the two in a few key areas.
Budget-Conscious Homeowners
Fiberglass pools offer a lower upfront investment and minimal long-term maintenance costs. For those looking to install a pool while staying within a budget limit, this may be the ideal solution.
Homeowners Seeking Luxury and Customization
Gunite pools are the undisputed champions for customization and aesthetic luxury. If your vision includes a resort-style infinity edge pool with custom water features and premium finishes, gunite is your best bet.
Those Prioritizing Quick Installation
Fiberglass pools can typically be installed and ready for use in under two months. Gunite pools, due to the multiple stages of design, construction, and curing, usually take several months.
Families Focused on Ease of Use and Maintenance
Fiberglass pools are ideal for families who want a pool that’s easy to maintain and safe for children. The smooth surface reduces the risk of abrasions and simplifies cleaning routines.
Looking Ahead: Future Trends in Pool Materials
While fiberglass and gunite remain the dominant choices, the swimming pool industry continues to innovate. Some companies are exploring hybrid models that combine the durability of gunite with the quick installation benefits of fiberglass. Others are expanding eco-friendly material options and sustainable construction techniques that could influence decisions in the future.
However, as of today, fiberglass and gunite remain the top two choices for inground pools due to their proven performance, availability, and widespread contractor support.
Final Thoughts: Making the Right Choice
Ultimately, the choice between fiberglass and gunite is not about which one is objectively “better,” but rather which aligns more closely with your personal priorities. Fiberglass pools offer:
- Faster installation
- Lower long-term maintenance
- A smoother, user-friendly surface
Gunite pools provide:
- Unmatched customization
- Premium aesthetics
- Long-term durability
Before making a final decision, consider consulting with licensed pool contractors, getting multiple quotes, and viewing finished installations in person. You can also speak with neighbors or friends who own either type of pool to get firsthand insights into ownership experience.
A backyard pool should enhance your quality of life, provide a space for relaxation and socialization, and offer a safe and enjoyable environment for your family. With careful planning and informed decision-making, either a fiberglass or gunite pool can fulfill that dream.
Resources for Further Evaluation
To help you compare these two options more effectively, consider the following actions:
- Visit pool showrooms and speak with designers
- Watch full installation process videos of both pool types
- Read verified customer reviews online
Take the time to explore all variables—your personal preferences, the unique characteristics of your property, and your long-term plans. A well-chosen pool will bring you years of enjoyment and become a cherished part of your home for decades to come.
What are the main differences between fiberglass and gunite pools?
Fiberglass pools are pre-molded structures made from fiberglass composite materials and are installed as a single piece after the hole is dug. They come in a variety of shapes and sizes but offer limited customization. Gunite pools, on the other hand, are built using a framework of rebar sprayed with a concrete and sand mixture called gunite. This construction method allows for almost unlimited design flexibility, enabling homeowners to create custom shapes, depths, and features.
The installation time also varies significantly between the two. Fiberglass pools typically take a few weeks to install due to the streamlined process of setting the shell and finishing the surrounding area. Gunite pools, by contrast, often require several months to complete, as the construction involves more labor-intensive steps like spraying, curing, and applying finishes. Because of their versatility, gunite pools are often preferred for unique landscapes or high-end designs, while fiberglass pools appeal to those seeking a quicker installation and lower maintenance.
Which type of pool is more durable: fiberglass or gunite?
Fiberglass pools are known for their excellent durability, especially when it comes to resistance against cracks and leaks. The flexible nature of fiberglass allows it to adjust better to ground movement than more rigid materials like concrete. If properly installed and maintained, a fiberglass pool shell can last 25 to 30 years or longer without significant structural issues.
Gunite pools, while also durable, require more long-term maintenance because they are made of concrete-based material, which is prone to cracking over time due to settling or temperature changes. However, cracks in gunite pools can often be repaired with resurfacing, which can extend their lifespan indefinitely. Therefore, while fiberglass offers inherent structural resilience, gunite pools can remain durable and functional for decades with proper care and resurfacing every 7 to 10 years.
Which is more expensive: fiberglass or gunite pools?
Fiberglass pools typically have a lower overall cost compared to gunite pools. This is because their installation process is faster and less labor-intensive, and the materials are usually less expensive. On average, fiberglass pools can range from $40,000 to $80,000 depending on size, features, and location, making them a more budget-friendly option for homeowners looking for a durable, ready-made structure.
Gunite pools are generally more expensive due to the labor and time involved in their construction. Since they are custom-built, the added cost of design work, excavation, rebar placement, gunite spraying, and finishing materials can push the total into the $50,000 to $100,000+ range or even higher for luxury models. Although they come with a higher upfront price, gunite pools can add more value to a property and offer long-term customization options that fiberglass may not match.
How do maintenance requirements differ for fiberglass and gunite pools?
Fiberglass pools are often considered the easier of the two to maintain. Their smooth, non-porous surface resists algae growth and typically requires minimal scrubbing, reducing the need for aggressive cleaning chemicals. Additionally, because fiberglass shells don’t require frequent resurfacing, maintenance is more straightforward and less costly over time.
Gunite pools need more regular care, particularly with their rougher and more porous surfaces. Algae tends to cling more easily to gunite, so more frequent brushing and chemical treatment may be necessary. Moreover, since gunite pools need to be resurfaced every 7 to 10 years, this adds both time and expense to their maintenance. For homeowners who value ease of upkeep and fewer chemicals, a fiberglass pool might be more appealing, while those willing to invest time into maintenance may enjoy the durability and longevity of a gunite structure.
Which pool type is better for custom designs?
Gunite pools are typically the better choice for homeowners seeking a highly customized design. Since they are sprayed directly onto a rebar framework, gunite can be molded into virtually any shape, allowing for unique features like vanishing edges, built-in seating, or unique curves that can complement landscape designs. For those who want a completely personalized backyard oasis or have unusual property contours, gunite offers the greatest flexibility.
Fiberglass pools, while offering a range of pre-made styles and sizes, are inherently limited in terms of customization. They are best suited for homeowners who prefer a streamlined, cost-effective installation and are open to selecting from available designs. Though some fiberglass models incorporate attractive features like tanning ledges or spa areas, they do not allow the same level of creative freedom as gunite. For those who desire a truly tailor-made pool, gunite is the standard choice.
Are there differences in installation time between fiberglass and gunite pools?
Fiberglass pools are much quicker to install compared to gunite pools. Once the ground is excavated and the site is prepared, the fiberglass shell can be delivered and placed in the hole in a matter of days. The surrounding area is then finished with decking and landscaping, and the entire process can often be completed within a few weeks, allowing homeowners to start using their pool sooner.
Gunite pools take significantly longer to install because of the multi-step process involved. After excavation, builders must create a rebar framework, spray the gunite, and allow time for curing before applying plaster or other finishes. This can easily take 3 to 6 months from start to finish, depending on weather, labor availability, and design complexity. Those looking to install a pool quickly and minimize disruption to their yard may prefer fiberglass, while gunite pool installations are best planned with a longer timeline in mind.
Which pool type holds up better in different climates?
Fiberglass pools are well suited for a variety of climates and resist damage from temperature changes better than other types. The flexibility of the fiberglass material allows it to expand and contract with ground shifts caused by freeze-thaw cycles, reducing the risk of structural damage. In colder climates where ground movement is common, this flexibility helps preserve the integrity of the pool shell.
Gunite pools, while durable, are more susceptible to cracking in regions with harsh winters or extreme temperature fluctuations due to the rigid nature of concrete. Proper installation and a well-prepared foundation can help minimize this risk, but cracking may still occur over time and require costly repairs or resurfacing. In areas with stable weather conditions, gunite tends to perform exceptionally well, making it a popular choice in warm climates. Fiberglass, on the other hand, remains a reliable option in both warm and cold environments.