What are the two primary functions of exterior wall coverings?

The primary functions of exterior wall coverings are to shed liquid water and protect the water-resistant barrier (WRB). This is crucial for maintaining the integrity of the building envelope. By effectively shedding water, wall coverings prevent moisture intrusion, which can lead to various issues such as mold growth, wood rot, and degradation of building materials.

The protection of the WRB is also significant, as this layer is responsible for preventing water infiltration while allowing moisture vapor to escape. Together, these functions ensure that the building remains dry and that the interior is protected from potential water damage.

In contrast, while insulation and soundproofing are important aspects of a structure, they primarily relate to the insulation materials used within walls rather than the wall coverings themselves. Aesthetics and structural integrity are indeed important considerations, but they don't encompass the essential protective functions that wall coverings serve against water intrusion. Supporting the roofing system is not a function of wall coverings, as the roofing system and exterior walls serve distinct structural roles within the building.