0        Adobe
1        Aluminum Siding
2        Asbestos Siding
3        Cement
4        Concrete
5        Concrete Block
6        Corrugated Metal
7        Galvanized Plate
8        Glass
9        Granite
A        Aluminum
B        Brick
C        Cement Block
D        Cinder Block
E        Grey Brick
F        Fiberglass
G        Hollow Tile
H        Lava Stone
I        Limestone
J        Logs
K        Marble
L        Metal
M        Frame
N        Metal Coating
O        Other
P        Metallic
Q        Plaster
R        Plastic
S        Steel
T        Plate Ceiling
U        Plywood
V        Reinforced Concrete
W        Rock
X        Sandstone
Y        Sheet Iron
Z        Mutually Defined
A0       Wood Metal Coating
A1       Sheet Metal
A2       Siding
A3       Slate
A4       Stucco
A5       Teja
A6       Tile
A7       Tin
A8       Veneer
A9       Vinyl Siding
AA       Wood Siding