Solar Reflectance Index Roofing Materials

The solar reflectance index or sri is a calculation using the aged solar reflectance and thermal emittance measurements of the asphalt shingles materials. The solar reflectance index sri is a measure of the solar reflectance and emissivity of materials that can be used as an indicator of how hot they are likely to become when solar radiation is incident on their surface. The sr value is a number from 0 to 1 0.

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