Materials Estimator

Walls (excluding gables)
Calculate the square footage of a rectangle

Height x Width = Surface Area
 Illustration of the Type
Height
Width

Surface Area =

Section: A
Height
Width

Surface Area =

Section: B
Height
Width

Surface Area =

Section: C
Height
Width

Surface Area =

Section: D
Height
Width

Surface Area =

Section: E

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Gable ends.
Calculate the square footage of a triangle.
Enter only the actual height and the actual width.
DO NOT add 1 to the height or enter half the width.
Allow the computer to do it for you.

(Height + 1) x (1/2 Width)
Illustration of the Type
Height
Width

Surface Area =

Section: A
Height
Width

Surface Area =

Section: B
Height
Width

Surface Area =
Section: C
Height
Width

Surface Area =
Section: D
Height
Width

Surface Area =
Section: E

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Upper wall of gambrel house.
Use illustration on right and enter measurements as noted.

(A + B) x 0.5 x C = Value One
D x 0.5 x B = Value Two
Value One + Value Two = Surface Area
Illustration of the Type
A B C SubTotal
D B   SubTotal2
Sum of the two values is the area. ===============
Total
Section: A
A B C SubTotal
D B   SubTotal2
Sum of the two values is the area. ===============
Total
Section: B
A B C SubTotal
D B   SubTotal2
Sum of the two values is the area. ===============
Total
Section: C
A B C SubTotal
D B   SubTotal2
Sum of the two values is the area. ===============
Total
Section: D
A B C SubTotal
D B   SubTotal2
Sum of the two values is the area. ===============
Total
Section: E

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Dormers.
Sum the area of two triangles.
Enter only the actual Height.
DO NOT enter half the Height.
Allow the computer to do it for you.

Width x (1/2 Height) x 2 = Surface Area


 Illustration of the Type
Width
Height

Surface Area =
Section: A
Width
Height

Surface Area =
Section: B
Width
Height

Surface Area =
Section: C
Width
Height

Surface Area =
Section: D
Width
Height

Surface Area =
Section: E

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This section will calculate the number of squares of siding you will need based on the information you have entered above.

To complete the estimate for siding material, all surface area calculations are added, then 10% is added to allow for waste, then the final figure is divided by 100 to get the number of squares of siding needed.

Wall surface area +
Gable Ends surface area +
Gambrel surface area +
Dormer surface area
=============================
Number of squares of siding needed
Illustration of the Type 
Walls
(excluding gables).
 Illustration of the Type 
Gable ends.
Illustration of the Type 
Upper wall of
gambrel house.
 Illustration of the Type 
Dormers.
A: Wall surface area:  
B: Gable Ends surface area:  
C: Gambrel surface area:  
D: Dormer surface area: +
=========================================

Number of squares of siding needed.

Section: A
A: Wall surface area:  
B: Gable Ends surface area:  
C: Gambrel surface area:  
D: Dormer surface area: +
=========================================

Number of squares of siding needed.

Section: B
A: Wall surface area:  
B: Gable Ends surface area:  
C: Gambrel surface area:  
D: Dormer surface area: +
=========================================

Number of squares of siding needed.

Section: C
A: Wall surface area:  
B: Gable Ends surface area:  
C: Gambrel surface area:  
D: Dormer surface area: +
=========================================

Number of squares of siding needed.

Section: D
A: Wall surface area:  
B: Gable Ends surface area:  
C: Gambrel surface area:  
D: Dormer surface area: +
=========================================

Number of squares of siding needed.

Section: E

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Soffit.

Repeat for all eaves and for all second floor and gable rake overhangs. Also estimate for areas under bay windows.
Length of eave x Width of eave = Surface Area
 Illustration of the Type
Length of eave
Width of eave

Surface Area =
Section: A
Length of eave
Width of eave

Surface Area =
Section: B
Length of eave
Width of eave

Surface Area =
Section: C
Length of eave
Width of eave

Surface Area =
Section: D
Length of eave
Width of eave

Surface Area =
Section: E

--------------------------------------------------------------------------------


Porch ceiling.

Repeat for all areas as needed.

Length of porch x Width of porch = Surface Area
 Illustration of the Type
Length of porch
Width of porch

Surface Area =
Section: A
Length of porch
Width of porch

Surface Area =
Section: B
Length of porch
Width of porch

Surface Area =
Section: C
Length of porch
Width of porch

Surface Area =
Section: D
Length of porch
Width of porch

Surface Area =
Section: E
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Esitmate the number of vented panels needed for your project.
Select the brand of siding you are using (required):
Charter Oak™   Greenbrial Beaded™   Super Span™ Alliance T4 (fully vented)   Alliance T4 (center vented)   2T

Give the following information in FEET:
(Length of attic floor x Width of attic floor )   /   2


Now the computer will the following values:

Total Net Free Area "tnfa" = Sq. Inches
Soffit Venting needed (tnfa / 2) = Sq. Inches
Approximate number of Full Panels Required "fpr" =
fpr = [(tnfa / 2)   /    rounded up to nearest whole number.]
Illustration of the Type

 

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