1. What is a Roof Replacement Cost Calculator?

Definition: This calculator estimates the total cost to replace an asphalt shingle roof based on roof area, material costs, and labor charges.

Purpose: It helps homeowners and contractors budget for roof replacement projects.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( C \) — Total cost ($)
• \( Q \) — Roof area (squares, where 1 square = 100 sq ft)
• \( P_{square} \) — Material cost per square ($/square)
• \( C_{labor} \) — Labor cost ($)

Explanation: The roof area is multiplied by material cost per square, then labor costs are added to get the total project cost.

3. Importance of Accurate Roof Cost Estimation

Details: Proper cost estimation ensures adequate budgeting, prevents project delays, and allows for comparison of contractor bids.

4. Using the Calculator

Tips: Enter the roof area in squares (divide total sq ft by 100), material cost per square (default $120), and labor cost (default $1500). All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: What's included in "price per square"?
A: This includes asphalt shingles, underlayment, nails, flashing, and other materials needed per 100 sq ft of roof.

Q2: How do I measure my roof area?
A: Measure your home's footprint, multiply by roof pitch factor (1.3 for medium pitch, 1.6 for steep), then divide by 100.

Q3: What affects labor costs?
A: Roof complexity, removal of old materials, location, and time of year can all impact labor costs.

Q4: What's a typical price range per square?
A: Basic asphalt shingles cost $80-$150/square, premium can be $200-$400/square.

Q5: Does this include disposal fees?
A: No, add 10-20% to labor costs if old roof removal is included, or ask your contractor for separate disposal quotes.