What might be a consequence of not having adequate cladding on a building?

Not having adequate cladding on a building can lead to a higher risk of water damage. Cladding serves as a protective layer that helps to seal the structure from the elements, including moisture from rain, snow, and humidity. When cladding is insufficient or improperly installed, water can infiltrate the building envelope. This can result in various issues, such as mold growth, deterioration of structural materials, and compromised insulation, all of which increase maintenance costs and can significantly affect the integrity of the building over time.

The other options, while positive attributes of building design, do not directly relate to the consequences of inadequate cladding. Increased energy efficiency typically results from proper insulation and sealing, not from a lack of cladding. Similarly, improved aesthetic appearance depends on the design and materials chosen for cladding, rather than an absence of it. Enhanced indoor air quality is influenced by ventilation and air filtration systems, not primarily by the presence or absence of cladding. Thus, the focus on the risks associated with inadequate cladding highlights its crucial role in protecting buildings from water damage.