Final answer:
A water-resistant barrier is required behind any exterior siding and veneer to protect the walls from moisture damage.
Step-by-step explanation:
Due to the potential for water accumulation within a wall, a water-resistant barrier (WRB) is required behind any exterior siding and veneer. This barrier plays a crucial role in protecting the structural components of the wall from moisture damage, which can lead to issues such as mold growth, rot, and deterioration of building materials. The WRB functions by providing a second line of defense against water that penetrates the exterior cladding. In addition to serving as a moisture barrier, it also allows for proper drainage and ventilation, ensuring any water that does get behind the siding can exit and that the wall can dry out. It is an essential component of modern building practices aimed at ensuring the longevity and integrity of the building's envelope.