“Cool roofs: What real-world results of Solar Reflectance Index (SRI).”
“Cool roofs: What real-world results of Solar Reflectance Index (SRI).” Now, with summer at its peak, the heat is more intense than ever, And there is a growing trend in the market of offering white roof coatings for cooling, Based on the Solar Reflectance Index (SRI). Theoretically It looks good and convincing, but the reality is a bit more complex. SRI- (Solar Reflectance Index) based coatings depend on surface reflectivity. Which means: • effectiveness depends on purely cleanliness of the surface • dust, pollution, and ageing gradually reduce reflectivity • Maintenance is Necessary — and in reality, How many rooftops are regularly cleaned? So the question is not just “What is the SRI value?” The real question is: “How much will it give result after six months… or even a year?” Tracking this is not simple & easy. Occasionally thermal gun readings—typically taken right after the surface is cleaned There’s no...