How it works
Siding is sold in "squares" of 100 square feet. Measure each wall, subtract windows and doors, then add waste.
Squares = Wall area × (1 + Waste%) ÷ 100
How to measure for siding
Measure the height and width of each wall, multiply for area, and subtract large openings like windows and doors. Add 5 to 15 percent for waste depending on the complexity of the job.
Common siding materials
Vinyl, fiber cement, wood, and engineered wood are the most common choices. Each has different cost, durability, and maintenance tradeoffs.