# Board and Batten Siding Calculator

Find how many boards, battens, and furring strips are needed to install board and batten siding by entering the dimensions of the building below for a wall or gable. Optionally, refine your estimate by providing the number of doors and windows are on the wall or gable.

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## How to Estimate Materials for Board and Batten Siding

Board and batten siding has a distinctive look with the boards installed vertically. It consists of 6″-8″ wide boards installed vertically, and an additional 2″-3″ batten board installed over the seams of the vertical boards.

Because the material is installed vertically additional furring strips are often installed first to provide a solid surface to attach each board to. The first step to estimating materials is to measure each wall’s width and height,

### Estimate Furring Strips for Board and Batten Siding

Furring strips are 2″-3″ boards that are installed horizontally every 18″-24″ on the wall. Since the building’s framing is also installed vertically, the board and batten siding will need to be attached to these strips.

To find the amount of furring strip material needed, first start by calculating the number of rows of furring strips that will need to be installed, which can be found by dividing the height of the building in feet by 2 to find the number of 24″ sections on the building. Round the number up to the nearest whole number, then add 1 to account for adding a strip along the top or bottom edge.

number of rows = (height in feet ÷ 2) + 1)

If your wall measurements are in inches, then divide by 24 instead of 2.

number of rows = (height in inches ÷ 24) + 1)

To find the linear feet of furring strip material, multiply the width of the wall in feet by the number of rows. Learn more about how to find linear footage.

linear feet = number of rows × wall width in feet

### Estimate the Number of Boards and Battens Needed

The boards used in board and batten siding are often 6″-8″, but can be any width of your choosing. The boards are usually wider than the battens and the battens are installed on top of the boards. The battens are usually thinner than the boards, often 2″-3″, though they can be wider as well.

When installing, boards should have a 1/2″ gap between them to allow for expansion and prevent buckling. larger gaps can also be used as needed, the battens should be 1″ wider than the gap to allow for good coverage.

To find the number of boards needed we simply need to divide the width of the wall by the width of the board. If a spacing is used between the boards add the width of the spacing to the wall width and to the board width to get an accurate measurement.

number of boards = (wall width in inches + board spacing) ÷ (board width in inches + board spacing)

To find the number of battens, simply subtract 1 from the number of boards.

number of battens = number of boards -1

Trim should also be accounted for. At least one board will be needed on either side of the wall at the edges.

number of edge trim boards = 2

Most of the time you will want your boards, battens, and trim to be whole boards, with no joints in the verticals. Because if this, be sure to order material by the board and find boards that are long enough to cover the wall height, and try to avoid ordering material by the linear foot.

## How to Layout Board and Batten Siding

One sign of a quality siding installation is an even layout of the siding, with all boards an even width. This requires some forethought to avoid installing the entire wall only to find that the last board needs to be cut down shorter. This can be accomplished by either widening the spacing between each board slightly, so that when multiplied by the number of boards it makes up for the unevenness.

If using this approach make sure the battens will still cover the space between the boards. An alternative approach would be to cut each board down so that the final boards can be evenly installed. Note that this step is not required, it is only necessary when it is desirable to avoid an uneven board width on the final board.

## More Siding Installation Resources

If you’re installing vinyl siding or need to estimate the amount of material in squares, our siding square calculator can estimate the squares of material needed to cover a wall. Our clapboard siding calculator can help estimate the amount of material needed for clapboard and lap siding. Finally, you can get free estimates from local siding professionals in your area to compare costs and find a contractor.