1. What is Asphalt Shingle Roof Cost per Square Foot?

Definition: This calculator determines the cost per square foot for installing an asphalt shingle roof based on material and labor costs.

Purpose: It helps homeowners and contractors estimate roofing project costs and compare pricing options.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( C_{sf} \) — Cost per square foot ($/ft²)
• \( Q \) — Quantity of shingles (squares)
• \( P_{square} \) — Price per square of shingles ($/square)
• \( C_{labor} \) — Labor cost ($)
• \( A_r \) — Roof area (ft²)

Explanation: The total material cost (quantity × price per square) plus labor cost is divided by the roof area to get cost per square foot.

3. Importance of Roof Cost Calculation

Details: Accurate cost estimation helps with budgeting, comparing contractor bids, and financial planning for roofing projects.

4. Using the Calculator

Tips: Enter the shingle quantity in squares (1 square = 100 ft²), price per square, labor cost, and total roof area. All values except labor must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a "square" in roofing terms?
A: One square equals 100 square feet of roof area, the standard measurement unit for roofing materials.

Q2: How do I find my roof area?
A: Measure length × width of each roof plane and sum them, or use our Roof Area Calculator.

Q3: What's included in labor costs?
A: All installation costs including tear-off of old roof, disposal, underlayment, flashing, and shingle installation.

Q4: What's a typical price range per square?
A: Asphalt shingles typically cost $80-$150 per square, depending on quality and brand.

Q5: Does this include waste factor?
A: No, add 10-15% to material quantities for cutting waste and starter strips.