The Solar Reflectance Index (SRI) is a measure used to evaluate how well a roof rejects solar heat. Many metal-roofing-singapore products boast high SRI values, which are often required to achieve Green Mark certification from the BCA. A high SRI indicates that the material stays cool in the sun, reducing the "oven effect" that can occur in attics during the afternoon. This technical ... https://kkroofspecialist.com.sg/metal-roofing-singapore/