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Fiber Cement Siding Calculator

Siding Exposure Lap

A simple fiber cement siding calculator that will calculate the amount of boards needed to cover a wall. It can be used for any type of siding that comes in boards of one length.

Directions:

Siding length, siding width and exposure need to be entered in decimal inches.

Most commonly used board is 12' x 8 ¼" with an exposure of 7"
Values that need to be entered for this size board would be:
Siding Length: 144"
Siding Width:  8.25
Exposure:  7
Fraction to Decimal Conversion Chart
1/8     0.125
1/4     0.25
3/8     0.375
1/2     0.5
5/8     0.625
3/4     0.75
7/8     0.875

After entering these three values you have to add a wall section. In the wall section you will add the wall length and the height of the wall.

The values entered in the first three fields plus the two in the wall section will provide you with a total number of boards needed.

Note: Siding needed does not include a waste factor.

All Amounts must be Entered

Siding Length:   inch
Siding Width:   inch
Exposure:   inch




Total amount needed:

Total Siding    # of Boards
Total Wall Area: ft ²





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