Material

Solar Reflectance

Emittance

Solar Reflectance Index

Age

White Concrete

0.7

0.9

86

New

Gray Concrete

0.35

0.9

35

New

White Concrete

0.68 - 0.77

0.9

45

weathered

Gray Concrete

0.41 - 0.52

0.9

19

weathered

Average Concrete

0.47

0.9

-

New

High White Cement

0.87

-

-

New

Conifer Tree

0.09 - 0.15

-

-

-

Deciduous Tree

0.15 - 0.18

-

-

-

Bare Soil

0.17

-

-

-

Green Grass

0.25

-

-

-

Desert Sand

0.4

-

-

-

Fresh Snow

0.8 - 0.9

-

-

-

Water

effective at low angles

-

-

-