Siding Calculator

How to Calculate Siding for Your Home

Here’s how siding is typically calculated:

1. Total Wall Area:
   Measure the height and width of each wall and multiply them to find the total surface area. Subtract the area of windows and doors to find the net wall area. Formula: \text{Net Wall Area} = (\text{Wall Height} \times \text{Wall Width}) - (\text{Window Area} + \text{Door Area})
2. Siding Material Required:
   Divide the net wall area by the coverage provided by one unit of siding material. Add a 10% allowance for waste and overlaps. Formula: \text{Material Needed} = \frac{\text{Net Wall Area} \times 1.1}{\text{Coverage per Unit}}
3. Cost Estimation:
   Multiply the total material units by the cost per unit to estimate expenses. Formula: \text{Cost} = \text{Material Needed} \times \text{Unit Price}

Example: Calculate Siding for a Wall

Let’s say you have a rectangular wall measuring 30 feet in width and 10 feet in height, with a window (15 sq. ft.) and a door (20 sq. ft.). Each siding unit covers 10 sq. ft., and costs $15 per unit.

1. Calculate the net wall area: \text{Net Wall Area} = (30 \times 10) - (15 + 20) = 300 - 35 = 265 \, \text{sq. ft.}
2. Determine the siding needed: \text{Material Needed} = \frac{265 \times 1.1}{10} = 29.15 \, \text{units (round up to 30 units)}.
3. Estimate the cost: \text{Cost} = 30 \times 15 = 450 \, \text{USD}.