Question 1

How do I calculate siding area?

Accepted Answer

Measure each wall height × width. Add gable triangles (½ × base × peak height). Subtract doors (~21 sf each), windows (~15 sf each), and garage doors (~128 sf each).

Question 2

How much extra siding should I order?

Accepted Answer

10-15% extra for waste and cuts. Cedar shingles need 15% due to irregular shapes. More waste on walls with many windows.

Question 3

What is the cheapest siding material?

Accepted Answer

Vinyl siding is cheapest at ~$3.50/sf installed. However, fiber cement and engineered wood offer better durability and often better 30-year total cost.

Question 4

How long does siding last?

Accepted Answer

Vinyl: 30 years. LP SmartSide: 35 years. Cedar: 40 years. Fiber Cement: 50 years. Climate, maintenance, and installation quality affect lifespan.

Siding Calculator

Wall Dimensions

Total Siding Area

Frequently Asked Questions

More Calculators & Tools

Ready to Start Your Project?