Gables
THE FORMULA FOR FINDING
THE AREA OF A TRIANGLE
BASE X HEIGHT
2
A Gable is a triangle.
Because of the
angles of each piece of siding to be cut,
there is more waste.
6 ft. high X 28 ft. wide =
168 sq. ft.
that would be the area for a square or rectangle.
The gable is a triangle,
therefore we will divide by 2 to find the area of
a triangle.
168 sq ft divided by 2 = 84
ft for the area
in each gable ( before waste ).
Here's the popular
method for calculating waste
in the gables.
Figure 1/3 more for waste
84 ft. x .33 = 27.72 ft.
(round up to 28)
84' + 28' = 112' X 2 (2 gables) = 224 sq. ft
of siding to be used in the gables.

Calculations
 Walls
Length of wall x height =
area
In this case all walls are
the same height, therefore we simply add them:
60 + 60 + 28 + 28 = 176 linear ft.
For a complex (typical
house) measure each wall and add them together
for wall total. Measure each wall height X width.
Wall Height
The wall height is 99
inches. The calculation will be different for
different panels.
If you are using an 8"
(double 4") you first determine how many
8" panels are required to cover the 99 inch
height. 99 inches divided by 8 inches = 12.37
panels.
Since this figure is more
than 12 (panels) you must go to 13 panels.
This requires 13 (8") panels.
13 panels X 8" = 104 inches.
Now let's find the footage.
104" divided by 12" (1 ft.) = 8.66 wall
height.
176' X 8.66 feet = 1524
sq. feet of
siding to cover the walls using an 8" panel.
If you are using a 10"
(double 5) panel:
99" divided by 10" = 9.9 panels, you go
to 10 panels, therefore 10 panels X 10" is
100". 100" divided by 12" (1 foot)
= 8.33 feet.
176' X 8.33 feet = 1466
sq. feet of siding
to cover the walls using a 10" panel.
The other side of the coin
..
Let's say the wall height is
96 inches ..
96" wall height
8" panel
This would require exactly
12 (8") panels with virtually no vertical
waste when using an 8" panel.
Do not let the "waste
factor" influence
your selection of a siding panel,
it's not that significant.
