What is the main function of stucco lath?

The main function of stucco lath is to act as a base for stucco. This provides a structural support system where the stucco can adhere properly, ensuring that the finished surface remains intact and durable. The lath serves as a framework that holds the wet stucco in place as it cures and hardens, creating a solid layer that is both aesthetically pleasing and functional.

While other options mention benefits such as thermal insulation, soundproofing, or serving as a water barrier, these are not the primary role of stucco lath. Instead, the lath itself is designed specifically to create a suitable surface for the application of stucco, which is important for the overall integrity and performance of the stucco system.