fiber cement board solar reflectance index

Inclusion of Solar Reflectance and Thermal Emittance Prescriptive ...18 May 2006 ... Inclusion of solar reflectance and Thermal Emittance. Prescriptive Requirements for Steep-Sloped Nonresidential Roofs in Title 24. (Revised May 18, 2006). This project was supported by the Pacific Gas and Electric Company (PG&E) through a grant to. LBNL via the .... There are no requirements by the EPA or the Cool Roof Rating Council (CRRC) to wash roofs. Some .... clay tiles, fiber-cement tiles, slate, wood shakes/shingles, architectural metal panels, and.

Inclusion of Solar Reflectance and Thermal Emittance Prescriptive ...17 May 2006 ... Inclusion of solar reflectance and Thermal Emittance. Prescriptive Requirements for Residential Roofs in Title 24. (Revised May 17, 2006 ). This work was supported by the California Energy. Commission (CEC) through its Public Interest Energy. Research .... There are no requirements by the EPA or the Cool Roof Rating Council (CRRC) to wash roofs. Some ..... clay tiles, fiber-cement tiles, slate, wood shakes/shingles, architectural metal panels, and individual metal ...

Solar Reflectivity (R) & Solar Reflectance Index (SRI) by Color ...solar reflectance index (SRI) by Color. solar reflectivity or reflectance is the ability of a material to reflect solar energy from its surface back into the atmosphere. The SR value is a number from 0 to 1.0. A value of 0 indicates that the material absorbs all solar energy and a value of 1.0 indicates total reflectance. Energy Star requires an initial SR value of 0.25 or higher for steep slope (>2:12) roofs and 0.15 or greater after three years. Low slope roofs require an initial SR value of 0.65 or ...

Heat Island - Portland Cement AssociationThe material's solar reflectance index (SRI) must be at least 29. Where paved surfaces are required, using materials with higher SRI will reduce the heat island effect, consequently saving energy by reducing demand for air conditioning, and improve air quality. Concrete and concrete pavers are ideally suited to meet this requirement. Ordinary portland cement concrete has an SRI in the range of 38 to 52, although it can vary. However, unless it is actually measured, LEED allows an ...

GAFGLAS EnergyCap Mineral-Surfaced Cap Sheet - GAF RoofingNote: The emittance and reflectance values published are those required for California Title 24 compliance as listed by CRRC. For certification or other reflectance and emittance code requirements, different calculations may be used resulting different values. All EnergyCap products meet LEED requirements. Please contact Technical Services at 1-800-766-3411 for assistance and submittal information.

Green in Practice 111 - Solar Reflectance of ... - Concrete ThinkerA recent laboratory study shows that concretes typically used in the US have a solar reflectance index (SRI) that meets the criteria of the LEED Sustainable Sites Credit for reducing heat islands. The Leadership in Energy and Environmental Design Green Building Rating System for New Construction and Major Renovation (LEED-NC) is a voluntary rating system for designing, building, and certifying green buildings. Download LEED-NC from the U.S. Green Building Council website: ...

Urban Heat Island Reduction, SRI - Concrete ThinkerThe solar reflectance of new concrete is greater when the surface reflectance of the sand and cementitious materials in the concrete are greater. Surface finishing techniques and drying time also affect solar reflectance. solar reflectance is most commonly measured using a solar reflectometer (ASTM C1549) or a pyranometer (ASTM E1918). A composite index called the solar reflectance index (SRI) is used by the U.S. Green Building Council and others to estimate how hot a surface ...

polysint sun reflect - PolyglassSPECIAL PRODUCTS. POLYSINT SUN REFLECT is a liquid waterproofing water-based membrane, with fibres in white colour at high solar reflectance and thermal emissivity with solar reflectance index (SRI) 105 which offers to all the surfaces a protection against damages caused by the atmospheric agents. Rev. 1. POLYSINT SUN REFLECT. SRI 105. Guaranteed Quality. UNI EN ISO 9001:2008 and. UNI EN ISO 14001:2004. Polyglass is a member of the Green Building Council ...

Solar Reflectance - The Portland Cement AssociationConcrete Shines as solar reflectance Material. Concrete does a very good job of reflecting solar energy. That is the finding from a Portland cement Association (PCA) study which measured the solar reflectance index (SRI) of 45 concrete mixes. Dark surfaces such as black roofs and dark pavements generally have a low solar reflectance, so they absorb heat from the sun and warm the air through convection. This may have a localized environmental impact in urban areas, commonly ...

GAF | United Coatings Kymax CoatingHigh Reflectivity/Emissivity United Coatings<sup></sup> Kymax<sup></sup> Coating is listed with the Cool Roof Rating Council with an SRI (solar reflectance index) of 110, which is among the highest of any roof coating. Reduced Energy ... It also provides exceptional UV and color stability, even in bright colors. Is a

Everything You Need to Know About Cool Roofing - Design and ...Cool and Standard Color-. Matched Concrete Tiles. Can increase solar reflectance by up to 0.5. Gain greatest for dark colors cool standard. R=0.37. R=0.29. R=0.15. R=0.23. R=0.26. R=0.29. Courtesy. American. Rooftile. Coatings ... Ballasted BUR, Single Ply. BUR w/ smooth asphalt coating. BUR w/ aluminum coating. Single ply EPDM, TPO, CSPE, PVC, PIB. Modified bitumen (SBS, APP). Metal roofing (painted and unpainted). Concrete tile. fiber cement tile. Metal tile.

Solar Reflectance Values of Concrete - Semantic ScholarMost nonmetallic opaque materials at temperatures encountered in the built environment have emittance values between. 0.85 and 0.95.5. solar rellectance index. The solar reflectance index (SRI) is a composite value calculated using the equations in ASTM E1980, "Standard. Practice for Calculating solar reflectance index of. Horizontal and Low-Sloped Opaque Surfaces." For a given set of environmental conditions, SRI is based on a surface's soJar reflectance and emittance.

Solar Reflectance - The Portland Cement Associationcombinations of concrete constituents meet the solar reflectance index requirements in the. Leadership in ... The lowest solar reflectances were from concretes composed of dark gray fly ash. The solar reflectance of the cement had more effect on the solar reflectance of the concrete than any other constituent material. The solar reflectance of the supplementary cementitious material had the ...... buildings. LEED is administered by the U.S. Green Building Council (USGBC), a coalition of.

Cool Roof Solutions Brochure - Johns Manville0.86. 0.86. 109. JM TPO. 0.77. 0.87. 101. GlasKap CR. 0.76. 0.85. 93. TopGard 4000. 0.83. 0.88. 102. TopGard 5000. 0.83. 0.88. 102. SBS CR. Membranes. 0.76. 0.85. 92. * LEED's solar Reflective index. ** Test Methods used by CRRC. 3 .... These products contain. 25 percent recycled post-consumer content by weight. JM insulation boards with recycled content include Fesco. board, Duraboard , ½" Retro-Fit board, and Fesco Foam rigid insulation boards. LEED points can&nbsp;...

Timberline Cool Series Shingle Features - GAF RoofingSimply put, our Cool Series<sup> </sup> Shingles use specially designed roofing granules that have greater reflectance than traditional shingles. This results in less transfer of heat ... Thanks to the reflective nature of the Cool Series<sup> </sup> Shingles, part of the heat radiating from the sun gets reflected, reducing the heat in the attic and heat going into the house. It may translate into .... Color, Initial solar reflectance, Thermal Emittance, solar reflectance index (SRI), LEED<sup> </sup> Credits. Cool Antique Slate&nbsp;...

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