When applying the finish coat, what is the alternate approach for shotcrete application to reach final grade?

The correct choice outlines the appropriate thickness range for the finish coat of shotcrete to achieve a smooth and functional final surface. When applying shotcrete, it is crucial to consider the necessary thickness for structural integrity and aesthetic quality. The specified range of 1/4 to 1 1/2 inches allows for adequate coverage to enhance performance and durability while also enabling the finish coat to adhere properly.

In this range, the application is thick enough to support effective bonding with the substrate and to allow for proper finishing techniques, which can include smoothing, texturing, or adding additional coatings. Too thin of a layer might compromise the structural qualities of the finish, lead to cracks, or necessitate more frequent repairs. Conversely, applying too thick of a layer could result in issues with weight, drying time, and potential cracking due to excessive stress as the material cures.

The focus on this range reflects best practices in commercial construction and pool contracting, ensuring that the finished surface meets both functional and visual requirements effectively.