Siding Board Calculator
Calculate the number of clapboards needed for your siding project, including overlap and exposure measurements.
How to Calculate Siding Materials
Understanding Board Exposure
Board exposure is the visible portion of each siding board after installation. For optimal water protection, boards typically overlap by 1-1.5 inches. The exposure affects both aesthetics and the number of boards needed.
Measuring Wall Area
Measure the total wall height and width, then subtract door and window areas. Add 10% for waste and cuts. For gable ends, calculate the triangle area separately using: (width × peak height) ÷ 2.