Sunday

Reflectance of Roof Materials


Material

Solar Reflectance
(%)

Temperature of Roof over Air Temperature (°F)

Bright white coating (ceramic, elastomeric) on smooth surface

80%

15°

White membrane

70%-80%

15°-25°

White metal

60%-70%

25°-36°

Bright white coating (ceramic, elastomeric) on rough surface

60%

36°

Bright aluminum coating

55%

51°

Premium white shingle

35%

60°

Generic white shingle

25%

70°

Light brown/gray shingle

20%

75°

Dark red tile

18%-33%

62°-77°

Dark shingle

8%-19%

76°-87°

Black shingle or materials

5%

90°


Source: Oak Ridge National Laboratory, Lawrence Berkeley National Laboratory, and the Florida Solar Energy Center Excerpted from N o-R e g r e t s R e m o d e l i n g by H o m e E n e r g y

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