Coverage Calculator

Coverage Calculator

COVERAGE CALCULATIONS

Siding and paneling are usually sold by the lineal (running) foot or the board foot. To simplify cost and coverage estimation, select the appropriate factor from the table according to the way the material is priced. The factors provided in the table can be used to calculate the amount of material required in lineal feet or in board feet. In either case, the square footage of the areas to be covered is calculated first, then multiplied by the appropriate factor.

PROCEDURE

  1. Calculate the square footage in walls (length x width = square footage)
  2. Calculate and subtract the square footage of openings.
  3. Add 10% for trim and waste.
  4. Multiply the result by either the factor for lineal feet or the factor for board feet.
  5. Multiply the total footage required by the price (see store associate for pricing).

Coverage Estimator

Pattern
Nominal Width
Dressed Width
Exposed Face Width
Factor for Lineal Feet1
Factor for Board Feet2 
Bevel and Bungalow
4
6
8
10
3-1/2
5-1/2
7-1/4
9-1/4
2-1/2
4-1/2
6-1/4
8-1/4
4.8
2.67
1.92
1.45
1.6
1.33
1.28
1.21
Dolly Varden
4
6
8
10
12
3-1/2
5-1/2
7-1/4
9-1/4
11-1/4
3
4
6-3/4
8-3/4
10-3/4
4
2.4
1.78
1.37
1.12
1.33
1.2
1.19
1.14
1.12
Drop T&G and Channel Rustic
4
6
8
3-3/8
5-3/8
7-1/8
3-1/8
5-1/8
6-7/8
3.84
2.34
1.75
1.28
1.17
1.16
Log Cabin
6
8
10
5-7/16
7-1/8
9-1/8
4-15/16
6-5/8
8-5/8
2.43
1.81
1.39
2.42
2.40
2.32
Boards
2
4
6
8
10
The exposed face width will vary depending on size selected and the way the boards-and-battens or boards-on-boards are applied. Minimum overlap is 1/2”. Determine the exposed face, then refer to footnotes to calculate factor. 

1 Lineal Foot Factor is derived by dividing 12" by the exposed face width.

2 Board Foot Factor is derived by dividing the nominal width by the exposed face width.

Note: Factors do not include any allowance for trim or waste and do not apply to diagonal installations. A 10% allowance (for trim and waste) should be added to the square footage required before the factors are used. Refer to “Procedure” above.

View Siding Selection, Installation & Finishing Guide