What is required to provide a weather-resistant exterior for buildings?

To achieve a weather-resistant exterior for buildings, all of the listed components are essential.

Implementing a water-resistive barrier behind the exterior veneer plays a crucial role in preventing water from penetrating the building envelope. This barrier acts as the first line of defense against moisture, minimizing the risk of water damage to the structural components within the wall assembly.

In addition, a means for draining water that enters the assembly is vital. Even with a water-resistive barrier, some moisture may still find its way into the wall. A well-designed drainage system allows any infiltrated water to escape, reducing the potential for mold growth and decay that can harm the building's materials and integrity.

Lastly, protection against condensation is also necessary. In certain climates and conditions, humidity can lead to condensation forming inside wall assemblies, which can also pose risks to the structure and indoor air quality. Proper ventilation, insulation, and design considerations address this issue.

Combining all three elements—water-resistive barriers, effective drainage solutions, and condensation management—ensures a comprehensive approach to maintaining the weather resistance of a building's exterior. Therefore, the correct answer encompasses all these critical aspects for optimal performance and protection against the elements.