Material

Metal surfaces

Asbestos cement

Aluminium

Old to contaminated

0.75

-

0.85

Polished

0.10

-

0.40

red

0.75

24 ST, clean

0.20

-

0.40

white (clean)

0.40

-

0.60

24 ST, dirt

0.50

-

0.60

Asphalt

75 ST

0.40

-

0.60

New

0.90

Coated

0.60

-

0.80

Weathered surface

0.80

-

0.90

Cast iron

Brick

Rough, oxidized

0.95

White glazed

0.30

Stainless steel (18/8)

Off-white

0.20

Several types of

0.40

-

0.50

Light

0.40

Oxidized types

0.60

-

0.80

Red (light to dark)

0.50

-

0.80

Steel

Yellow

0.50

-

0.70

Polished

0.20

Blue

0.90

Mat oxidized

0.95

Concrete

Zinc

Unstained (depending on age)

0.60

-

0.70

Polished

0.55

Stained black

0.90

Lead

Coloured - brown

0.85

Old

0.80

Roofing

Copper

Red roof tiles

0.60

-

0.70

Polished

0.15

Blue tiles

0.80

-

0.90

Rough

0.75

+ gravel roofing felt

0.80

-

0.90

Galvanized iron

Sandstone

Polished

0.35

White, fine sand

0.40

New

0.65

White, coarse sand

0.50

Old

0.90

Light red

0.55

With aluminium paint

0.40

Red

0.70

With white lead (PbCO3)

0.30

Stone Types

With oil, white

0.40

Basalt

0.70

With oil, red

0.75

Granite

0.60

-

0.90

With oil, black

0.90

Granite red

0.55

Paints

Limestone

0.36

-

0.60

Bronze paint

0.30

-

0.50

Lei

0.80

-

0.95

Off-white

0.35

Marble, white

0.45

-

0.60

White (Al203)

0.55

Marble, split

0.60

White, white lead (PbCO3)

0.25

Stucco

White, zinc white (ZnO)

0.32

White

0.30

-

0.50

White (MgCO3)

0.15

Light Yellow

0.45

Light green

0.50

Light

0.75

Whitewash

0.25