Gunite Pool Installation in Tennessee: The 2026 Homeowner''s Guide

If you're planning a backyard pool in Mt. Juliet, Lebanon, Franklin, Brentwood, Hendersonville, Gallatin, or Nashville, you've likely felt anxious about Middle Tennessee's heavy clay soil, limestone bedrock, and the permitting process in Davidson and surrounding counties.

This guide gives you the confidence to navigate the 2026 construction landscape — from understanding the excavation process on challenging lots to knowing what to expect from local permitting requirements.

Understanding Gunite Pools for Tennessee Backyards

Shotcrete — also known as gunite — is the preferred method for high-end residential pools because of its strength and versatility. It involves a high-pressure application of sand, cement, and water sprayed directly over a thick cage of steel rebar, creating a monolithic shell that is significantly more durable than vinyl or liner alternatives.

Unlike vinyl liners that can tear or fade, gunite offers limitless customization: integrated tanning ledges, beach entries, massive waterfalls, any shape or depth you desire. A well-built custom gunite pool is a permanent addition to your property and a meaningful upgrade to your outdoor living space.

The Technical Difference: Gunite vs. Poured Concrete

While people often use the terms interchangeably, gunite and traditional poured concrete are quite different. Traditional concrete is a "wet-mix" poured from a truck, which can lead to inconsistencies in shell thickness. Gunite uses a "dry-mix" process where water meets the material at the nozzle, allowing the builder to adjust the mixture on the fly. The result is a shell with notably higher density — an important characteristic when building in Tennessee's constantly expanding and contracting clay soil.

Adapting to Middle Tennessee's Unique Terrain

For properties with sloped lots, irregular grades, or complex site conditions in areas like Brentwood or Franklin, gunite's on-site construction process offers meaningful flexibility. Because the shell is formed in place, builders can engineer custom shapes, integrate structural retaining walls, and adapt to elevation changes in ways that are difficult or impossible with pre-manufactured alternatives. That said, the right pool type for any given property depends on the specific site, design goals, and conditions — not a single universal rule. Experienced builders also know how to work with natural limestone outcroppings found on many local properties, creating a "backyard resort" aesthetic that feels like a natural extension of your home.

The Step-by-Step Gunite Pool Installation Process

Phase 1: Design and Layout

We stake out the exact perimeter in your backyard so you can see the scale of your vision before we move any dirt. This is also when we review your property plat, HOA requirements, and any setback or easement considerations.

Phase 2: Excavation

The messiest phase — and where Middle Tennessee's notorious clay and limestone come into play. We prioritize site protection using silt fences and plywood to safeguard your lawn from equipment damage. Excavation duration varies depending on site access, soil and rock conditions, weather, and overall project complexity.

The Rock Clause: If we hit solid limestone, the "Rock Clause" in your contract covers the specialized hydraulic hammer equipment needed to break through. We believe in total transparency so there are no surprises during the dig. Rock encounters are not uncommon in Middle Tennessee, and we plan for that possibility from the start.

Phase 3: Steel Rebar and Plumbing

We build a rigid skeleton of steel rebar and install the circulation system. The rebar grid is engineered to allow the pool to act as a single, rigid unit — especially critical near limestone outcroppings where one side of the hole may rest on solid rock and the other on softer soil.

Phase 4: The Gunite Shoot

The most dramatic step. During the gunite application, the pool's structural form takes shape as we spray the mixture at high velocity over the steel frame. We follow the technical protocols outlined in the American Concrete Institute (ACI) Guide to Shotcrete to ensure every project meets the highest industry standards.

Phase 5: The Curing Process

Concrete-based materials like gunite develop their strength over time through a chemical hydration process. Curing requirements are followed according to the applicable construction specifications for each project. During this period, the homeowner plays a vital role by watering the shell regularly — this moisture supports the hydration process that transforms the wet mixture into a high-strength shell. Tennessee's humidity and rainfall can actually help this process.

Phase 6: Finishing

We apply modern 2026 tile, coping, and plaster to give your pool its signature look. The 2026 design season is seeing a strong shift toward sun shelves for shallow lounging and deep, dark plaster finishes that create a mirror-like effect on the water.

Gunite vs. Fiberglass: Choosing the Right Build for TN Soil

Factor	Gunite	Fiberglass
On-site construction	Generally involves a longer on-site construction process	Generally has a shorter on-site installation process once the site and shell are ready
Design flexibility	Fully custom shapes, depths, and features built in place	Selected from manufacturer-produced shell shapes and configurations
Sloped/irregular lots	On-site construction allows custom engineering for complex grades	Site preparation and engineering options vary by project
Clay soil	Substantial shell mass provides stability	Different structural characteristics; suitability depends on site conditions
Interior finishes	Interior finishes may require resurfacing over time depending on finish type, water chemistry, maintenance, and use	No replastering needed
Customization	Tanning ledges, waterfalls, infinity edges, any shape	Limited to available manufacturer shapes and configurations

For homeowners dealing with irregular lot shapes, steep grades, or complex terrain, gunite's on-site construction flexibility is a significant advantage worth discussing with your builder. Fiberglass pools offer their own advantages, including faster installation and lower long-term maintenance demands — the best choice depends on your property, design goals, and priorities.

Climate Resilience: From TN Summers to Freezing Winters

Tennessee's rapid freeze-thaw cycles test the limits of any outdoor construction. Gunite's thermal expansion characteristics make it well-suited to Tennessee's temperature swings. Proper winterization of the plumbing is still essential, but the shell is engineered to withstand Tennessee's seasonal extremes through the coldest January nights and the hottest July afternoons.

Navigating the Logistics: Permits, Timelines, and 2026 Trends

Permitting in Murfreesboro and Davidson County

Pool projects must comply with applicable local permitting, inspection, and safety requirements. Requirements vary by jurisdiction and can include building permits, barrier and alarm requirements, and inspections at various stages of construction. Marlin Exteriors coordinates applicable project requirements as part of the construction process.

Tennessee's Katie Beth's Law establishes drowning-prevention requirements for residential pools, including provisions for water alarms and physical barriers. We handle the documentation and coordination required to meet these standards for your specific project and location.

HOA Approvals

If you live in a community like Blackman Farm or Marymont Springs, we help you navigate the HOA approval process — providing professional renderings and site plans your architectural board needs to feel confident in the structural integrity and aesthetic of your project.

Strategic Timing for the 2026 Season

We recommend starting your gunite project in the fall or winter. This off-season approach allows us to complete the messiest excavation work before heavy spring rains arrive, giving your project the best chance of being ready for summer. Planning ahead also avoids the spring rush and keeps your project on a steady, logical schedule.

Why Marlin Exteriors Is Your Trusted Partner for Gunite Construction

At Marlin Exteriors, Inc., we bring more than 20 years of construction experience to every project. Our roots are firmly planted in Mt. Juliet, and we've spent decades serving families across the entire Middle Tennessee area — Mt. Juliet, Nashville, Franklin, Murfreesboro, Brentwood, Hendersonville, Gallatin, and Lebanon.

We maintain strict requirements for steel rebar spacing and ensure gunite thickness exceeds industry minimums, building pools designed for long-term durability. We manage every administrative and technical complexity so you can focus on the excitement of your new backyard resort.

To make your first consultation as productive as possible, have these items ready:

• Property plat maps showing existing structures and easements
• Your specific HOA guidelines and approval requirements
• Inspiration photos or a list of must-have features (tanning ledges, waterfalls, infinity edge, etc.)

Ready to build your private oasis? Contact Marlin Exteriors, Inc. for your custom gunite pool quote today.