Building codes primarily dictate what aspect of a building?

Building codes are established to ensure safety, health, and welfare in the construction and occupancy of buildings. Among the various aspects that building codes address, the required amount of ventilation a building must have is crucial for maintaining indoor air quality. Proper ventilation is essential in controlling pollutants and ensuring an adequate supply of fresh air for occupants. Building codes typically specify ventilation requirements to reduce the risk of airborne contaminants, thereby supporting overall health and safety.

The options regarding materials for construction, maximum height, and required exits are also important aspects covered by building codes, but they primarily focus on structural integrity, fire safety, and egress in emergencies, rather than the specific requirements that relate to the quality of air within the building. The correct answer highlights the critical role that ventilation plays in promoting a safe and healthy indoor environment.