Fiberglass vs. Gunite Pools: Why Tennessee Soil Makes the Choice Clear

If you’ve started researching inground pools in Middle Tennessee, you’ve likely come across two common options: fiberglass and gunite. Both have their place—but here in Tennessee, the terrain and climate make one option clearly superior for long-term durability, flexibility, and value.

At Basin Pool Designs, we specialize exclusively in custom gunite pools—and for good reason. Here’s why gunite is a smarter investment for Tennessee homes.

1. Tennessee Soil Is Unforgiving

From Brentwood to Columbia, our region has a mix of expansive clay, shale rock, and shifting subsoil. These conditions can be especially tough on pre-manufactured fiberglass shells, which are rigid and can crack under stress.

Gunite, on the other hand:

• Is sprayed and shaped onsite over a steel framework

• Cures into a monolithic, reinforced concrete shell

• Is far more tolerant of ground movement and pressure changes

In short: gunite holds up better when the ground shifts—which it often does here.

2. Custom Design = Better Fit for Complex Lots

Many Tennessee properties feature sloped lots, walkout basements, or irregular shapes. Fiberglass pools are built in factory molds and shipped to your site—meaning:

• Size and shape options are limited

• Installation can be difficult on steep or narrow lots

• Integration with hardscaping or outdoor living is less seamless

Gunite pools are designed to match your exact layout, vision, and elevation—making them ideal for challenging terrain in places like Nolensville or Forest Hills.

3. Aesthetic Control and Finish Quality

Fiberglass pools are available in a few factory-set colors and shapes. Gunite pools offer:

• Full creative control over shape, depth, and features

• Premium finish options (plaster, quartz, pebble)

• High-end tile, coping, and custom detailing

• Integrated features like spas, ledges, fire bowls, and water walls

If you want your pool to be a visual centerpiece—not just a container for water—gunite is the clear choice.

4. Long-Term Performance and Resale Value

While fiberglass pools may offer faster installation, they also come with long-term limitations:

• Gel coat finishes can blister or fade over time

• Shell replacements can be expensive if damage occurs

• Resale appeal may be lower for high-end homes

Gunite pools:

• Last 30+ years with proper care

• Can be resurfaced or remodeled as trends change

• Increase curb appeal in premium markets like Brentwood or Belle Meade

The Verdict: Gunite Wins in Tennessee

If you’re building a pool in Middle Tennessee, don’t settle for the fast-and-cheap fiberglass route. With unpredictable soil, premium property values, and a four-season lifestyle, a custom gunite pool is simply the better investment.

At Basin Pool Designs, every pool we build is engineered for longevity, beauty, and local terrain.

Ready to get started? Contact us today to schedule your custom pool consultation.