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Roofing Estimate Calculator

Flat / Low Slope (2/12) Standard (4/12 – 6/12) Moderate (7/12 – 9/12) Steep (10/12+)
Asphalt Shingles (Basic) Architectural Shingles Metal Roofing Clay Tile / Slate
Yes (Tear off & Disposal) No (Overlay)

Estimated Project Cost

$0.00
Total Squares: 0
Material Cost: $0
Labor/Tear-off: $0
Pitch Factor: 0
function calculateRoofCost() { var sqft = parseFloat(document.getElementById('roofSqFt').value); var pitch = parseFloat(document.getElementById('roofPitch').value); var materialPrice = parseFloat(document.getElementById('materialType').value); var tearOffRate = parseFloat(document.getElementById('tearOff').value); if (!sqft || sqft <= 0) { alert("Please enter a valid square footage."); return; } // Calculations var actualSurfaceArea = sqft * pitch; var squares = actualSurfaceArea / 100; var materialTotal = actualSurfaceArea * materialPrice; var laborAndTearOff = actualSurfaceArea * (tearOffRate + 3.00); // 3.00 is base installation labor var grandTotal = materialTotal + laborAndTearOff; // Formatted Outputs document.getElementById('totalCost').innerText = '$' + grandTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('totalSquares').innerText = squares.toFixed(2); document.getElementById('matCostOnly').innerText = '$' + materialTotal.toLocaleString(undefined, {maximumFractionDigits: 0}); document.getElementById('laborCostOnly').innerText = '$' + laborAndTearOff.toLocaleString(undefined, {maximumFractionDigits: 0}); document.getElementById('pitchUsed').innerText = pitch; document.getElementById('resultDisplay').style.display = 'block'; }

Understanding Roof Replacement Costs

Replacing a roof is one of the most significant investments a homeowner can make. Our roofing estimate calculator helps you determine the rough budget required based on your home's footprint, the complexity of the roof, and the materials you choose.

Key Factors Influencing Your Estimate

  • Roof Squares: In the roofing industry, a "square" is a 10×10 foot area (100 square feet). Most contractors bill based on the number of squares required.
  • Pitch (Slope): Steeper roofs are more difficult to work on, require more safety equipment, and have a larger surface area than flat roofs covering the same ground footprint.
  • Material Quality: While basic asphalt shingles are budget-friendly, metal and tile offer longer lifespans but come at a significantly higher initial cost.
  • Tear-Off vs. Overlay: Removing the old layers of shingles adds labor and disposal fees, but it is generally recommended to inspect the underlying roof deck for rot.

Example Calculation

If you have a 2,000 square foot home footprint with a standard pitch (1.15 multiplier) and choose Architectural Shingles:

  1. Actual Surface Area: 2,000 sq ft × 1.15 = 2,300 sq ft.
  2. Number of Squares: 23 squares.
  3. Material Cost: 2,300 sq ft × $6.50 = $14,950.
  4. Labor/Removal: 2,300 sq ft × $4.50 = $10,350.
  5. Total Estimated Cost: $25,300.

Note: This calculator provides an estimate for budgetary purposes. Local labor rates, permit fees, and specific architectural features like chimneys, skylights, or complex valleys can change the final quote from a licensed contractor.

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