LEED AP Building Design and Construction (BD+C) Practice Exam

What is a three-year aged SR (or SRI)?

1. A solar reflectance rating measured fresh from the surface

2. A solar reflectance index rating that is measured after three years of weather exposure

3. A rating exclusive to roofing materials

4. A measurement for assessing thermal performance

The correct answer is: A solar reflectance index rating that is measured after three years of weather exposure

A three-year aged Solar Reflectance Index (SRI) is a rating that reflects the solar reflectance of a surface after it has been exposed to natural weathering conditions for three years. This aged value is significant because it provides a more accurate assessment of how the material will perform in real-world environments over time. Initially, solar reflectance is often higher when materials are fresh, but factors like dirt accumulation, material aging, and weather exposure can alter that reflectance. This rating is particularly important when considering the sustainability and energy efficiency of a building, as materials with a higher SRI can help reduce heat island effects and lower energy consumption for cooling. Understanding the aged SRI helps designers and builders make informed decisions about the selection of materials that will maintain their performance over the lifespan of the building. The other options do not accurately represent what a three-year aged SRI indicates. While solar reflectance may be measured right after application, the aged rating is meant to simulate long-term exposure. Additionally, SRI is not limited to roofing materials; it can apply to various surfaces and materials, making it a broader measure than indicated in one of the choices. Furthermore, while some measurements assess thermal performance, the focus of the aged SRI is primarily