Gunite, fiberglass or liner: choosing the right pool for a Middle Tennessee backyard

Most families start a pool search with a shape in mind and a budget they're a little nervous to say out loud. The material usually comes later, and it shouldn't. The material decides which shapes are possible, how the pool gets into your yard, and what owning it feels like in year ten. Here's how the three inground options really differ.

Gunite: the one that bends to your yard

Gunite is concrete sprayed over a cage of steel rebar, then finished with plaster. Because the shell is formed on site, it can be nearly any size, depth or outline. That matters in Middle Tennessee, where plenty of backyards are not flat rectangles. A sloped lot, a view you want the pool to point toward, a tree line you refuse to lose: a gunite shell gets built around all of it.

It also takes the most extras without a fight. Sheer-descent waterfalls, a raised spa with a spillway, a vanishing edge, built-in benches, a tanning ledge, stonework that ties into the patio. If your picture of the backyard has features in it, gunite is usually where they live.

The cost of that freedom is a longer build and a surface that wants steady attention. Plaster is rougher underfoot than fiberglass, and it's less forgiving about water chemistry, especially in the first months. Neither one is a dealbreaker. A good builder explains the routine before the pool is ever filled.

Fiberglass: the low-maintenance shell

A fiberglass pool is molded in a factory as a single piece, trucked out and set into the excavation with a crane. The surface is smooth and nonporous, so algae has a hard time holding on. Owners who would rather swim on Saturday than scrub tend to look hard at fiberglass, and it usually takes less chemical babysitting than concrete or vinyl.

The limits are shape, size and access. You pick from the molds that exist, and the shell has to physically reach your yard. A tight side gate, overhead lines or a steep driveway can shrink the list fast. Inside those limits there are plenty of shapes and sizes, and the finished pool is easy to live with.

Vinyl liner: the affordable way in

A liner pool is a framed shell with a custom-cut sheet of vinyl fitted inside. It's usually the most affordable way to put water in the ground, and liners come in plenty of shapes, patterns and accent options. The surface is soft and smooth, which kids and grandparents both tend to like.

The catch is the liner itself. It doesn't last forever. Somewhere around the ten year mark, depending on care and chemistry, it needs replacing, and that belongs in your long-term plan instead of coming as a surprise. A sharp toy or a careless pool vacuum can shorten its life. For some families the lower starting cost is still the right call, especially when it frees money for the deck, the lighting and the rest of the backyard.

Five questions that usually settle it

• How level is the yard, and how much of it do you want to use? A slope or an odd outline points toward gunite.
• How much weekly upkeep do you actually want? If the answer is as little as possible, give fiberglass a serious look.
• Do you want waterfalls, a raised spa, a vanishing edge or custom steps and benches? That's gunite territory.
• Can a truck and a crane reach the site? Fiberglass needs both.
• What's the whole budget, including decking, fencing, lighting and landscaping? A liner pool can leave room for the rest of the backyard.

Soil, drainage and who you hire

Soil deserves a mention. Much of Middle Tennessee sits on clay and rock, which holds water and shifts with the seasons. Whatever material you choose, the excavation, drainage and base work around the pool matter as much as the pool itself. A builder who has dug in your area will ask about it before talking finishes.

It also helps to talk with someone who builds all three. A company that sells one type will steer you toward it. Kirk and Jody Goddard, who run Four Seasons Pool & Spa in Franklin, have more than 20 years each in this work, build gunite, fiberglass and liner pools, and build at any budget. The conversation starts with how your family will use the yard, not with a product.

If you're still sorting through the three, call Four Seasons Pool & Spa at (615) 219-5770 or use the contact page, and tell them about your yard. Bring the questions above. They're a good place to start.