Residential Roofing Solar Reflectance Index

Cool asphalt roofing shingles are characterized by 3 key values.

Residential roofing solar reflectance index.

For example a standard black asphalt shingle would have an sri in the low single digits. Only the aged solar reflectance and emittance values listed within the crrc rated products directory may be used to meet the cool roof requirements in the energy standards. The solar reflectance and thermal emittance values of roofing products. Sri calculations 01 aged reflectance listed with crrc 02 crrc listed aged solar reflectance 03 initial solar reflectance 04 calculated aged solar reflectance 05 thermal emittance c.

It is defined so that a standard black surface reflectance 0 05 emittance 0 90 is 0 and a standard white surface reflectance 0 80 emittance 0 90 is 100. As with landmark solaris gold shingles presidential solaris gold shingles are virtually identical in appearance to the same shingles without the solar reflective roofing surface. Installing a cool roof can cut your energy costs while contributing toward a better environment. Solar reflectance thermal emittance and solar reflectance index sri.

Furthermore it doesn t store as much thermal energy as an ordinary roof. Cool roof rating council. When buying an energy efficient roof the solar reflectance index sri is the first thing to look for. The higher the sri the cooler the roof will be.

By lessening the demand for energy it decreases carbon emissions that cause pollution. This measure is calculated from the tsr and te. This may increase your home s energy efficiency and help the environment. The presidential solaris series of shingles feature solar reflective roof surfaces that achieve energy star standards but in certainteed s thick rich luxury styled shake replacement shingle.

Apart from making your life easier this metric also helps you decide more soundly to lower your utility bills and minimize your property s carbon footprints. Even if not required by energy codes cool asphalt roofing shingles may lower the cooling load on a home in hot climates. 06 roof pitch b. Cool roof rating council crrc has created a rating system for measuring and reporting the solar reflectance and thermal emittance of roofing products.

The solar reflectance index sri is a measure of the constructed surface s ability to reflect solar heat as shown by a small temperature rise. Results 01 solar reflective index registration number. The guide to choosing a cool roof. All rated roofing products will have a crrc label with the efficiency values listed.