1. What is the Asphalt Shingle Replacement Cost Calculator?

Definition: This calculator estimates the total cost to replace asphalt shingles 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 replacement cost ($)
• \( Q \) — Roof area in squares (1 square = 100 ft²)
• \( P_{square} \) — Price per square of shingles ($)
• \( C_{labor} \) — 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 Cost Estimation

Details: Proper cost estimation prevents budget overruns and helps compare contractor bids effectively.

4. Using the Calculator

Tips: Enter roof area in squares (divide total sq ft by 100), price per square (default $150), and labor cost (default $3000). All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a "square" in roofing terms?
A: 1 square = 100 square feet of roof area. This is the standard measurement unit in roofing.

Q2: What's the typical price range per square?
A: Asphalt shingles typically cost $100–$200 per square, depending on quality and region.

Q3: How is labor cost determined?
A: Labor usually costs $3,000–$5,000 for an average roof (20–25 squares), or $150–$300 per square.

Q4: Does this include disposal of old shingles?
A: Typically yes, but confirm with your contractor as some may charge extra for disposal.

Q5: How do I measure my roof area?
A: Multiply house footprint area by roof pitch multiplier (e.g., 1.3 for 7/12 pitch), then divide by 100 to get squares.