1. What is an Asphalt Shingle Roof Replacement Calculator?

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

Purpose: It helps homeowners and contractors budget for roof replacement projects by providing accurate cost estimates.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( C \) — Total cost ($)
• \( Q \) — Roof size in squares (1 square = 100 sq ft)
• \( P_{square} \) — Price per square of materials ($)
• \( C_{labor} \) — Labor cost ($)

Explanation: The roof size 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 helps with budgeting, financing, and comparing contractor quotes for roof replacement projects.

4. Using the Calculator

Tips: Enter roof size 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 is a "square" in roofing terms?
A: 1 square = 100 square feet of roof area. It's the standard measurement unit for roofing materials.

Q2: What's a typical price per square for asphalt shingles?
A: Prices range from $80-$150 per square depending on shingle quality and region, with $120 being average.

Q3: How is labor cost typically calculated?
A: Labor can be a fixed project cost or calculated per square ($50-$150 per square). Our default is $1500 for average roofs.

Q4: Does this include disposal of old roofing?
A: Typically yes, as most contractors include disposal in their labor quote, but confirm with your contractor.

Q5: What other costs should I consider?
A: Add 10-15% for unexpected repairs, permits, or upgraded materials like ice/water shield or better underlayment.