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Professional Roofing Cost Calculator

Asphalt Shingles (Basic) Architectural Shingles Metal Roofing Clay Tile Natural Slate Wood Shakes
Flat or Low Slope (0-3/12) Standard Pitch (4/12 – 6/12) Steep Pitch (7/12 – 9/12) Very Steep (10/12+)

Estimated Total: $0.00

Estimated Cost per Square (100 sq ft): $0.00

Material Subtotal: $0.00

Labor & Disposal: $0.00

*Disclaimer: This is a rough estimate. Local labor rates, permit fees, and specific structural repairs can vary final pricing by 20-30%.

function calculateRoof() { var area = parseFloat(document.getElementById("roofArea").value); var materialBasePrice = parseFloat(document.getElementById("materialType").value); var pitchMultiplier = parseFloat(document.getElementById("roofPitch").value); var removeOld = document.getElementById("removeOld").checked; if (isNaN(area) || area <= 0) { alert("Please enter a valid roof area."); return; } // Calculation Logic var removalCostPerSqFt = removeOld ? 1.50 : 0; var laborBasePerSqFt = 2.50; // Average base labor // Adjust labor based on pitch var totalLaborAndRemoval = (laborBasePerSqFt + removalCostPerSqFt) * pitchMultiplier; var materialTotal = area * materialBasePrice; var laborTotal = area * totalLaborAndRemoval; var grandTotal = materialTotal + laborTotal; var squares = area / 100; var costPerSq = grandTotal / squares; // Update DOM document.getElementById("totalCost").innerHTML = "$" + grandTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById("costPerSquare").innerHTML = "$" + costPerSq.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById("materialSub").innerHTML = "$" + materialTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById("laborSub").innerHTML = "$" + laborTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById("results-area").style.display = "block"; }

How Much Does a New Roof Cost?

Replacing a roof is one of the most significant investments a homeowner will make. On average, a professional roof replacement in the United States ranges from $7,500 to $25,000, depending on the size of the home and the materials selected.

Key Factors Influencing Your Roofing Quote

  • Roof Size: Contractors measure roofs in "squares." One roofing square equals 100 square feet. The more squares, the higher the cost of both materials and labor.
  • Material Choice: Asphalt shingles are the most affordable and common. However, premium materials like metal or slate can last 50 to 100 years, offering a better long-term ROI despite the high upfront cost.
  • Pitch and Complexity: A steep roof (high pitch) is more dangerous and difficult to work on than a flat or low-slope roof. Contractors charge more for labor on steep surfaces because they require specialized safety equipment and more time.
  • Waste and Removal: Tearing off one or two layers of old shingles adds to the labor cost and requires debris disposal fees. Our calculator includes an option to estimate these costs.

Comparison of Roofing Materials

Material Average Lifespan Price Range
Asphalt Shingles 15-30 Years $3.50 – $7.00 / sq ft
Metal Roofing 40-70 Years $9.00 – $16.00 / sq ft
Clay/Concrete Tile 50+ Years $12.00 – $25.00 / sq ft

Cost-Saving Tips for Your Project

To keep your roofing costs down, consider scheduling your replacement during the "off-season" (late winter or early spring). Additionally, always get at least three quotes from licensed contractors to ensure competitive pricing. While it may be tempting to overlay new shingles on top of old ones to save on removal costs, most experts recommend a full "tear-off" to inspect the underlying roof deck for rot or damage.

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