fiber cement board solar reflectance index

everything you need to know about cool roofing - design and

solar reflectance. typical solar reflectance values for. cool roofs: ? low slope. – 0.65 or 0.70 and greater. ? steep slope. – minimum of .25 and up to .65 single ply epdm tpo cspe pvc pib. modified bitumen (sbs app). metal roofing (painted and unpainted). concrete tile. fiber cement tile. metal tile. clay tile.【Get Price】

inclusion of solar reflectance and thermal emittance prescriptive

may 18 2006 decreasing thermal emittance to 0.80 from 0.85 increases the temperature of a roof with solar reflectance. 0.55 by .. clay tiles fiber-cement tiles slate wood shakes/shingles architectural metal panels and reflectance index a metric that compares the temperature of a roof to that of a standard white.【Get Price】

urban heat island reduction sri - concrete thinker

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 will get when exposed to full sun. the temperature of a surface depends on the surface's reflectance and emittance as well as solar radiation. the solar reflectance index (sri) is 【Get Price】

solar reflectivity (r) & solar reflectance index (sri) by color

solar reflectivity (r) &. 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 【Get Price】

practical issues for using solar-reflective materials to - citeseerx

key word index: building materials solar radiation solar reflectance heat island cooling load air- . overlap- ping units include shakes shingles tiles and panels fiber-cement shingle. 10-30. 2.84. white fiber-cement tile. 60-80. 0. unpainted metal (steel aluminum). white painted metal shingle shingle. 70 c. 3.49-6.00.【Get Price】

reducing urban heat islands - epa

when new concrete has a high solar reflectance and generally is considered a cool pavement; however it loses reflectance over time as discussed in . the “solar reflectance index” is a value on a scale of zero to 100 that incorporates both solar reflectance and thermal emittance in .. often containing fibers for added.【Get Price】

solar reflectance - dc kerckhoff company

this report presents the results of solar reflectance testing on 135 concrete specimens from 45 concrete mixes combinations of concrete constituents meet the solar reflectance index requirements in the. leadership in leed is administered by the u.s. green building council (usgbc) a coalition of individuals and 【Get Price】

concrete as solar reflectance material - portland cement association

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. lighter colored materials (such as concrete) generally have a higher solar reflectance. they reflect heat from the sun and do 【Get Price】

indow white roofs keep your house cool - indow windows

jul 7 2017 white roofs have a similar effect benefiting both our homes and the environment. you can create a white roof a number of ways. buy solar reflective asphalt shingles or clay concrete or fiber cement tiles. or paint an existing dark roof with a reflective white coating that has a solar reflectance index (sri) as 【Get Price】

solar reflectance index of pedestrian pavements and their

index terms—aging solar reflectance index optical properties of investigaciones científicas y técnicas -conicet- (national council of. scientific . concrete red rustic circular fan. 71. 0.55 0.90 54. 0.41 0.95 -17. p05 x. concrete black rustic circular fan. 52. 0.35 0.95 51. 0.38 0.95 -1. p06 x concrete-stone gray rustic flat.【Get Price】