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Solar Reflective Index(SRI) becomes an important parameter while selecting a highly reflective roof coating which keeps roof cool, lowers the indoor temperature and reduce the cooling cost in a building
High SRI coatings, Solar thermo-reflective coating roof cooling coatings, Cooler roofs cooler indoor, Heat reflective roofs, High Albedo Paint
The SRI value is a calculation method as per ASTM E1980-11(2019) using Solar reflectance(or sometimes referred as TSR total solar reflectace) and thermal emittance values to determine the roof’s overall capacity to refuse solar heat.
Solar reflectance is the amount of solar energy (across the solar spectra UV, VIS, IR) that is reflected away from the building, back to the atmosphere. The higher the solar reflectance is of a coating, the less heat the building have to absorb. Thermal emittance is the relative abilility of a roof to emit (release the heat back into atmosphere) heat that has been absorbed.
Therfore, the higher the SRI value is, the greater ability the coating has to reject solar heat absorption, maintaining a much cooler indoor ambient air temperature even without the need of air conditioning.
The SRI solar reflectance index is a scale of 1 to 100 that is a measure of a roof’s combined thermal properties. It is defined so that a standard black (reflectance 0.05, emittance 0.90) is 0 and a standard white (reflectance 0.80, emittance 0.90) is 100. But some hot roofs can have negative values, and most white thermo-reflective roofs, white thermoplastics and cool pavement coatings have scores higher than 100.
In India Confederation of Indian Industry (CII) leading the way for sustainable practices. Confederation of Indian Industry (CII) formed the Indian Green Building Council (IGBC) in year 2001. Indian Green Building Council (IGBC) has licensed the LEED Green Building Standard from the USGBC. IGBC facilitates Indian green structures to become one of the green buildings.
LuminX solar heat reflective roof cooling coating for roofs
According the results reported by CEPT University – Ahemdabad for our LuminX cool roof test samples. LuminX Solar reflective summer cool roof coating provides the highest reflectivity capabilities availble to the roof coating market. LuminX delivered highest long-term solar reflectance and SRI rating of all the roof coatings in the market. This roof coating is excellent choice for professionals for rejecting heat absorption, lowering energy cooling costs and creating a cooler, more comfortable environment inside the building.
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