1. What is a Roof Replacement Cost 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.

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 ensures adequate budgeting, prevents project delays, and allows for comparison of contractor bids.

4. Using the Calculator

Tips: Enter the roof size in squares (divide total sq ft by 100), material price 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: A square is a unit of measurement equal to 100 square feet of roof area.

Q2: What's a typical price per square for asphalt shingles?
A: Prices typically range from $100-$150 per square for materials, depending on shingle quality.

Q3: How do I estimate my roof size in squares?
A: Measure your home's footprint, multiply by the roof pitch factor (1.3 for moderate pitch), then divide by 100.

Q4: What affects labor costs the most?
A: Roof complexity (valleys, chimneys), local labor rates, and roof height/access difficulty.

Q5: Does this include disposal of old roofing?
A: Typically yes, as most contractors include disposal in their labor quote, but confirm with your contractor.