Shotcret vs. Gunite for Swimming Pool Interior

It’s been over 100 years since Gunite was invented and since then there has been nothing but controversy over its use. Today, we only hear about Shotcrete and Gunite as the floor and walls of backyard pools, but:

  • Which one is better?
  • Which is stronger?
  • Which is more versatile?
  • What is the difference between them?



Gunite was invented in 1907 and is technically the name for the process for shooting concrete from a pneumatic gun. The process is the same now as it was over 100 years ago, a dry concrete mix is shot from a hose with compressed air, with a water hose mounted underneath. The flow of each hose is individually adjustable and the mix combines on impact.



Initially, Gunite was the brand name and Shotcrete was an upstart competitor company, one of many. It’s come to be commonly known as the name for shooting a wet mix of concrete from a pneumatic gun. Where Gunite shoots separate water and dry concrete, “Shotcrete” is pre-mixed water and concrete.

The Pros and Cons of Each System:



  1. Mix prepared quickly in a cement truck and fed into the sprayer system
  2. Wet mix tends to bond more effectively, leaving less debris than Gunite
  3. Applies a larger volume of concrete in a much shorter time than Gunite
  4. Mix may become too wet to hold in place on vertical or inverted surfaces
  5. Mixture takes longer to dry than Gunite
  6. Unused concrete cannot be salvaged



  1. Adjustable water means the mixture can be dry enough to stay in place without slipping or dripping
  2. Adjustable water means the mixture can dry and harden faster than Shotcrete
  3. The mixture can be sprayed vertically at a ceiling, or overhanging surfaces without falling off
  4. Unused concrete mix can be stored and used later
  5. Takes longer to load the concrete into the sprayer
  6. Takes longer to complete a pool


Both Shotcrete and Gunite are sprayed at a steel rebar framework, which act as the bones of the swimming pool, which reduces the risk of fractures and adds tensile strength to the pool floor and walls.

There is no clear winner in this controversy, which is why it has been going on for 107 years. Which option is best for your pool? That depends on your pools:
How deep will your deep end be?
How big is your pool going to be?
Fortunately, the contractors we use are experts in their fields, you’ll get to talk with and get bids from both Shotcrete and Gunite concrete specialists.

We’ll make sure that you can make a statement, make your own rules, Build Your Own Pool and Save Thousands.