What is one of the primary purposes of measuring overhangs?

Measuring overhangs primarily serves the purpose of determining solar shading over windows. This is crucial in energy-efficient design because overhangs can significantly influence the amount of sunlight entering a building. Appropriate overhang dimensions can help to minimize heat gain in the summer months by providing shade, while still allowing sunlight in during the winter when the sun is lower in the sky. By assessing how much shade an overhang offers, you can make informed decisions on window placement, type, and energy efficiency strategies.

The other options, while relevant to building assessments, do not directly align with the primary focus of measuring overhangs. For instance, assessing roofing materials and evaluating structural integrity pertain more to the roof's construction and materials rather than how overhangs interact with solar energy. Analyzing water damage risks is related to drainage and moisture management but does not directly reflect the function of overhangs in regards to solar shading. Understanding the role of overhangs in controlling light and heat is essential for maximizing comfort and energy efficiency in buildings.