Three-year-aged solar reflectance index d of 64 The use of area-weighted averages to comply with these requirements shall be permitted. LEED requires a roofing material to have a value of 29 or higher for a steep roof pitch >2/12 and 78 or higher for a roof pitch <2/12. Solar Reflectivity Commercial Foam Roofing provides GREEN SOLUTIONS for Louisiana' building sustainability and energy use reduction. skburnett skburnett: "Project: Cabin on Mt. Kynar 500 ® based painted metal roofing can achieve solar reflectance of over 70%. ..." - Galvalume : Light Reflectance Values (5/24/2004) within the Galvalume discussion of the residential metal roofing forum SRI measures the roof’s ability to reject solar heat, defined such that a standard black (reflectance 0.05, emittance 0.90) is 0 and a standard white (reflectance 0.80, emittance 0.90) is 100. The high reflectivity, emissivity and solar reflectance index (SRI) of Berridge metal roofing helps mitigate the heat island effect. Steep Slope roofs must have an initial solar reflectance of >= 0.25. SRI is measured on a scale from 0 to 100. 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. Cool metal roofing is defined as painted or coated metal products that reflect the sun’s energy to dissipate heat. In addition to metal’s versatility, strength, and longevity as roof and wall systems, this little to no price discrepancy means that cool roofing is getting specified and installed more frequently in architectural projects. Colors: SMI’s paint colors Solar White and Medium Bronze are both cool metal coils/sheets (COOLR®), but have very different SRI values. In conjunction with lower energy consumption, cool roofing can help reduce “power plant emissions, including carbon dioxide, sulfur dioxide, nitrous oxides, and mercury, by reducing cooling energy use in buildings,” according to the U.S. Department of Energy. Post-consumer steel recycled content: 25.6% Pre-consumer steel recycled content: 6.8% TOTAL RECYCLED CONTENT: 32.9%. In fact, cool metal roofing doesn’t have anything to do with the metal substrate itself – it’s solely dependent on the paint or coating system that is applied to the substrate during the manufacturing process. According to the U.S. Green Building Council, the Solar Reflectance Index (SRI) is a measure of the constructed surface’s ability to stay cool in the sun by reflecting solar radiation and emitting thermal radiation. Innate reflectance is measured on a scale from 0 to 1, with the latter being the highest level of reflectivity (meaning it reflects 100% of all radiant energy coming in contact with it). For more information on LEED v4 certification visit www.usgbc.org. Kynar 500 ® based painted metal roofing can achieve solar reflectance of over 70%. LEED is a building rating system available for nearly all building and home projects that provides the framework for businesses, contractors, and property owners to follow to be recognized as sustainable. Cool metal roofing is defined as painted or coated metal products that reflect the sun’s energy to dissipate heat. This method has become an accepted part of LEED applications and known as Cool Roof Systems. For example, high-gloss finishes tend to have a higher solar reflectance and SRI than low-gloss or matte finishes. However, some locations will experience more a significant percentage of cost savings than others. Introducing the new generation of PRIMAMAJU-R® Steel incorporated with the REFLEC™ Technology: with better solar reflectance performance, reducing the roof surface temperature up to 3˚C* compared to the previous generation. Also important characteristic to a metal building panel color is the ability of the panel to release absorbed energy, called emissivity. The use of Berridge Manufacturing metal roofing products can directly contribute up to two LEED v4 credits for Heat Island Reduction, but when a “whole building design” approach is implemented, metal roofing combined with other concerted efforts, products and building systems can contribute to other LEED v4 credits. This may increase your home’s energy efficiency and help the environment. Solar reflectance (SR) is the ratio between the solar energy globally reflected by a surface and the total incident solar energy. Contrarian Metal Resources: Solar Reflectance Index - YouTube Compared to conventional roofing materials of lower reflectance index (SRI), such as ZINCALUME® steel and all other roofing materials in the COLORBOND® steel range. Solar Reflectance Index Metal Roofing. The SRI is a calculation method using solar reflectance and thermal emittance values to determine the roof's overall capacity to refuse solar heat. A cool metal roof with high solar reflectance and high thermal emittance would have a lower surface temperature as compared to a roof with low reflectance and low emittance. Solar Reflectance Index The Solar Reflectance Index (SRI) is a roof’s ability to reject solar heat. This value is derived from using the materials SR value and its’s emissivity value, the material’s ability to release absorbed heat, in accordance with ASDM 1980 calculations. According to the Lawrence Berkeley National Laboratory: For every 1% increment in roof reflectance, the surface temperature of the metal roof decreases 1 degree Fahrenheit. Solar Absorptance. Spray Polyurethane Foam Roofing has the highest rated insulation R-value available. The index ranges from 0 to 100, with a standard black surface having an initial SRI of 0 and a standard white surface having an initial SRI of 100. But opting out of some of these cookies may have an effect on your browsing experience. 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. Here at Sheffield Metals, the bulk of our metal coils and sheets consist of our energy-efficient metal roofing metal brand, COOLR®, which is a metal roof and wall product engineered to meet the compliance standards set forth by ENERGY STAR® and LEED. The push for building materials that reduced energy consumption, including cool roofing, was made a priority in response to the 2003 Northeast U.S. blackout. Solar Reflectance Index The Solar Reflectance Index (SRI.) Depending upon the surface finish, cool metal roofing can provide enhanced energy effi… We also use third-party cookies that help us analyze and understand how you use this website. By lessening the demand for energy, it decreases carbon emissions that cause pollution. Solar Reflectance Index (SRI) – Solar Reflectance Index is the most common index used to measure the reflectivity effectiveness of a color for a metal roof or wall. As we mentioned above, roofing slope plays heavily into the compliance requirements for both ENERGY STAR and LEED v4. Roofing. SRI is a little more complicated to define because it’s measured using a complex formula that includes more than just the solar reflectance and emissivity values: However, to make it easier, the Lawrence Berkeley National Laboratory created a downloadable SRI calculator where you can input the solar reflectance and emissivity values, and it will calculate it for you. To meet LEED requirements, a roofing material must have an SRI of 29 or higher for steep slope roofing and a value of 78 or higher for low slope roofing when evaluated under medium wind conditions. Compared to conventional roofing materials of lower reflectance index (SRI), such as ZINCALUME® steel and all other roofing materials in the COLORBOND® steel range. The Solar Reflectance Index (SRI) is used to determine compliance with LEED requirements and is calculated according to ASTM E 1980 using values for reflectance and emissivity. BERRIDGE METAL ROOFING IS COOL AND SUSTAINABLE The high reflectivity, emissivity and solar reflectance index (SRI) of Berridge metal roofing helps mitigate the heat island efect. Berridge’s Kynar 500® or Hylar 5000® cool metal roof colors are optimal for reducing energy consumption, particularly where cooling loads dominate. Solar Reflective Index (SRI) is important to understand when selecting a highly reflective roof coating that will help lower energy cooling costs. The Solar Reflectance Index (SRI) is used to determine compliance with LEED requirements and is calculated according to ASTM E 1980 using values for reflectance and emissivity. 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