HOW TO USE IT
How to use the Roof Replacement Cost Calculator
- 1
Enter the roof footprint in sq ft.
- 2
Choose the pitch (0 = low, 1 = medium, 2 = steep).
- 3
Select the material and the number of layers to tear off.
- 4
Review the total cost and line-item breakdown.
THE MATH
Roof replacement cost formula
Total = effective area × (material + labor + tear-off + disposal)Effective area accounts for pitch (x1.15 medium, x1.35 steep) and cut waste (5-15%). Asphalt runs ~$4/sq ft installed, metal ~$8/sq ft, concrete tile ~$9/sq ft. Each layer torn off adds ~$1.20/sq ft.
PRACTICAL EXAMPLE
2,000 sq ft roof, medium pitch, asphalt shingles
Effective area = 2,530 sq ft. Materials = $10,120. Labor = $5,566. One-layer tear-off = $3,036. Disposal = $1,265. Total ≈ $19,987.
FAQ
Frequently asked questions
How much does a roof replacement cost in 2026?
Use $5-$15/sq ft as a planning range, then replace it with current supplier, crew and disposal quotes for the job location.
Do I need to tear off all layers?
Layer limits vary by roof covering, deck condition and local code; inspect the assembly and confirm locally before bidding an overlay.
Does pitch really change the price?
Yes — steep pitches require more safety, scaffolding and time; the calculator uses a 35% planning factor.