Side 4 Less

How To Measure A House For Siding..
We Make It Easy For Measuring A House For Siding!




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.

Using the 10" panel (double 5)

Total amount of siding required for walls and gables = 1466 + 224 = 1690 SQ FEET



Now let's figure the Overhang (Soffit) and Fascia.
(The overhang is 12" and the fascia is 6")

Some dealers use "coil stock" to form up the fascia (and other trim items) while other dealers may use a fascia panel. For our purpose here we will not "bog" down in those details.

Step one - Add the following:

176 ft. around the house + 4 ft. (12" or 1 foot overhang at each corner) + 6' high each gable = 192 Linear ft.


A math student would argue that 6' added for the rise in each gable is too much. I agree! but this is the easiest way to satisfy everybody. The actual formula: 6' squared + 15' squared then extract square root of that sum X 2 will give you the exact length of the gable end soffit & fascia. BUT we ain't gonna do it! If you use this exact method, you'll make too many people mad at you! Nobody likes a smart guy:(

Very few people know how to properly measure a house for siding! You must consider whether you are using an 8 inch panel or a 10 inch panel (for example). Don't even try to argue with people who don't realize this.


192' X 12" (1 foot) overhang = 192 square feet of soffit before waste. Add 10% waste for soffit. 192' + 20' (waste) = 212 sq ft. of Soffit Material and about 192 linear feet of 6" fascia before waste.


A 6 inch fascia board has a bottom (1 inch) and usually a few breaks so figure about 8 inches for a 6 inch board.

(so you don't run short and have to make a trip)
Sometimes the job runs perfectly and no bad cuts, prepare for error. Keep it in good shape and return that which is not used, if you can. You can use little short pieces but the job appearance suffers.

Ceiling material is figured in square footage using a 10 % waste factor. Porch ceiling material is usually the same as soffit material. This same material is also often used for under-pinning. The amount of waste is dependent on the skill of the applicator and the design of the house. Some houses are "cut up" with many turns, etc. We call them "Ginger Bread" houses and those have waste. Some are like boxes with hardly any waste.

Window & Door Facing are more difficult to cover and the material is figured in square feet the same as any area but the waste factor is high. COIL STOCK comes in rolls and is aluminum (either vinyl-clad or painted aluminum). A METAL BRAKE is used to form the pieces. Some is smooth and some is textured. I like a vinyl clad, texture.

Porch Beams, Posts, Frieze Boards and other trim items are labor intensive, the materials are figured like any other area with a high waste factor. COIL STOCK is used for most all of these components the same as window, door facings and fascia.

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