What differentiates a roof leak from condensation in an attic?

The correct answer highlights the fundamental nature of how leaks and condensation manifest in an attic. Leaking occurs due to water entering the home from an outside source, such as a damaged roof, and it typically follows the principles of gravity. This means that water from a leak tends to flow downwards, accumulating in the lower areas of the attic space or dripping onto walls or floors.

In contrast, condensation forms from moisture in the air that reaches a surface cooler than the dew point temperature, resulting in water droplets. This process is not dictated by gravity; rather, it depends on temperature differences and air movement. Thus, condensation can appear in various places throughout the attic, not necessarily aligned with a downward flow.

Understanding this distinction is crucial for home inspectors in identifying the source of moisture issues. Recognizing that leaks follow gravity while condensation does not can help inspectors provide accurate assessments and recommendations for homeowners.