While Custom Concrete Creations specializes in concrete floors, we love all things concrete. What better way to build concrete walls than with a concrete spray gun. This is done using was has been termed as shotcrete, a way to cast concrete walls in place. Fresh shotcrete mix is sprayed directly onto erected wall panels that form a building and can be applied to any surface that fresh shotcrete will adhere to, e.g. steel, wood, or polystyrene.