Roofing With 3 Years Minimun Reflectance

Resources Leedcool Roof Rating Council

Resources Leedcool Roof Rating Council

Ce Center Cool Roofs For A Hot Planet

Ce Center Cool Roofs For A Hot Planet

Confindustria Ceramica

Confindustria Ceramica

Energy Star Roofing Cool Metal Roofing Kynar Mcelroy Metal

Energy Star Roofing Cool Metal Roofing Kynar Mcelroy Metal

Https Www Co Fresno Ca Us Home Showdocument Id 8294

Https Www Co Fresno Ca Us Home Showdocument Id 8294

Https Www Nps Gov Tps Sustainability Greendocs Doe Coolroofguide Sm Pdf

Https Www Nps Gov Tps Sustainability Greendocs Doe Coolroofguide Sm Pdf

Https Www Nps Gov Tps Sustainability Greendocs Doe Coolroofguide Sm Pdf

A cool roof on residential buildings is defined as one with a 3 year aged solar reflectance of at least 0 20 and an infrared emittance of at least 0 75 or minimum sri of 16 in climate zones 10 through 15 for steep slope applications greater than 2 12 and where the roofing product has a density less than 5 pounds per square foot.

Roofing with 3 years minimun reflectance.

Reflectance refers to the roofing material s ability to reflect the energy coming from the sun instead of absorbing it. After 3 years the solar reflectance must be 0 15. The requirements apply to new construction and to retrofits or additions that replace or re coat at least 2 000 ft 2 of roof space for nonresidential buildings and 1 000 ft 2 of roof space for. The doe uses the low sloped cool roof definition from table 1 and defines steep sloped cool roofs as those with a 3 year aged sri of 29 or greater.

After 3 years the solar reflectance must be 0 50. Effective january 1 2010 the standards will require that a cool roof material meet an aged solar reflectance value 3 year testing provided by the cool roof rating council crrc. 0 65 initial 0 50 aged. These shingles must have an initial solar reflectance of at least 0 25 and a three year solar reflectance measurement of at least 0 15.

Steep slope roofs must have an initial solar reflectance of 0 25. 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. If you re following iecc you have a couple of options for roof materials. You can install one with a three year aged solar reflectance index sri of 64 or you can instead opt for one with an aged sri of 55 combined with an aged thermal emittance of 0 75 or.

Only those roof products that meet the specifications listed in either table 1 or table 2 below may qualify as energy star qualified. Materials lacking 3 year aged tested values for either solar reflectance or thermal emittance shall be assigned both a 3 year aged solar reflectance in accordance with section c402 3 1 and a 3 year aged thermal emittance of 0 90. Aged solar reflectance tested in accordance with astm c 1549 astm e 903 or astm e 1918 or crrc 1 standard. The energy star program specifies minimum solar reflectance low slope.

Http Www Dnr Louisiana Gov Assets Tad Builders Guide Chapter 10 Pdf

Http Www Dnr Louisiana Gov Assets Tad Builders Guide Chapter 10 Pdf

3 2 Opaque Envelope Assembly

3 2 Opaque Envelope Assembly

Http Www Ontarioca Gov Sites Default Files Ontario Files Building Cool Roof For Low Rise Residential 2016 Stds Pdf

Http Www Ontarioca Gov Sites Default Files Ontario Files Building Cool Roof For Low Rise Residential 2016 Stds Pdf

Http Www Sjgov Org Commdev Cgi Bin Cdyn Exe Handouts Building Coolroofcochandout Pdf

Http Www Sjgov Org Commdev Cgi Bin Cdyn Exe Handouts Building Coolroofcochandout Pdf

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