Shotcrete vs. Gunite: What’s the Difference?

Professional Pool Company — Understanding the Two Most Common Pool Shell Materials

Gunite and shotcrete are two types of pneumatically applied concrete used to build pool shells. Both produce strong, long-lasting structures, but the way they are mixed and applied is different — and those differences matter when comparing quality, consistency, and structural performance.

This article explains the differences between gunite and shotcrete, how each is installed, and why most high-end builders prefer gunite for custom residential pools.

⭐ 1. The Simple Breakdown

Gunite

• Dry-mix concrete
• Water added at the nozzle
• More control over consistency
• Ideal for custom shapes and detailed features
• Industry standard for premium pool construction

Shotcrete

• Pre-mixed wet concrete
• Water added at the batch plant or truck
• Less control during application
• More common in commercial or high-volume projects

Both can create strong shells, but gunite offers superior consistency and adjustability during application.

⭐ 2. How Gunite Works (Dry-Mix System)

Gunite arrives as dry sand and cement in a pressurized hose.

Water is added only at the spray nozzle, allowing the nozzleman to:

✔ Adjust moisture instantly

✔ Achieve optimal compaction

✔ Prevent rebound (loose material)

✔ Build precise shapes and details in real time

Gunite is extremely flexible for:

• Steps
• Benches
• Curves
• Raised walls
• Spas
• Sunshelves

This is why most custom pool builders prefer gunite.

⭐ 3. How Shotcrete Works (Wet-Mix System)

Shotcrete is pre-mixed concrete delivered in a ready-mix truck.

Because it is already mixed:

✔ The consistency is fixed

✔ Adjustments at the jobsite are limited

✔ Timing is critical (concrete must be applied before it begins to set)

✔ Weather and traffic can impact mix quality

Shotcrete is often used for large commercial projects where volume is more important than intricate shaping.

⭐ 4. Strength & Durability Comparison

Gunite Strength

Gunite typically reaches 4,000–4,500+ PSI, depending on the mix and application.

Because moisture is controlled at the nozzle, compaction is excellent.

Shotcrete Strength

Shotcrete mixes often reach 4,000–6,000 PSI, but only if:

• The mix is correct
• The truck hasn’t over-watered
• Conditions are ideal
• The material arrives quickly

Strength depends heavily on plant quality control.

⭐ 5. Key Differences That Matter for Homeowners

Moisture Control

• Gunite: On-the-spot control → better consistency
• Shotcrete: Controlled at the plant → may vary by delivery conditions

Workability

• Gunite: Best for custom carved features
• Shotcrete: Best for straight walls, large surfaces

Timing

• Gunite: No rush — material doesn’t set until water hits nozzle
• Shotcrete: Must be sprayed immediately after delivery

Crew Skill

• Gunite: Nozzleman experience is crucial and highly specialized
• Shotcrete: More forgiving for high-volume production

⭐ 6. Which Method Is Better?

Both can build a strong pool, but gunite offers:

✔ More control

✔ Better adaptability

✔ Superior shaping flexibility

✔ Consistent application

✔ Less moisture-related variation

For these reasons, gunite is the preferred choice for custom residential pools, including those built by Professional Pool Company.

⭐ 7. Why We Use Gunite

Professional Pool Company uses gunite because it provides:

• More consistent structural integrity
• Higher precision for benches, steps, and curves
• Better compaction and adhesion
• Cleaner application with less rebound
• Superior finish quality

Gunite ensures a shell that lasts decades and aligns with our construction standards.

⭐ 8. Summary: Shotcrete vs. Gunite

Gunite (Dry-Mix)

✔ Water added at nozzle

✔ Extremely customizable

✔ Best control during application

✔ Builder-preferred for residential pools

Shotcrete (Wet-Mix)

✔ Pre-mixed concrete

✔ Less on-site control

✔ Must be sprayed immediately

✔ Common in commercial builds

Both are forms of pneumatically applied concrete, but gunite’s flexibility and control make it the superior choice for custom home pools.

⭐ Have Questions About Your Pool Shell?

We’re always happy to explain the materials and techniques used in your build.

👉 Ask us anytime during your project.

Updated on: 29/11/2025