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Roofing Cost Estimator

Flat (0/12 – 3/12) Standard (4/12 – 6/12) Steep (7/12 – 9/12) Very Steep (10/12+)
Asphalt Shingles (Basic) Architectural Shingles Standing Seam Metal Clay or Concrete Tile Natural Slate
Yes (Remove 1 Layer) Yes (Remove 2 Layers) No (Overlay)

Estimated Project Total: $0.00

Material Cost: $0.00

Removal/Labor Cost: $0.00

*This is a rough estimate. Local labor rates and complex roof shapes (dormers, chimneys) may increase costs by 10-20%.

function calculateRoofingCost() { var area = parseFloat(document.getElementById("roofArea").value); var pitchMultiplier = parseFloat(document.getElementById("roofPitch").value); var materialRate = parseFloat(document.getElementById("materialType").value); var removalRate = parseFloat(document.getElementById("removalRequired").value); if (isNaN(area) || area <= 0) { alert("Please enter a valid roof area."); return; } // Effective area based on pitch var effectiveArea = area * pitchMultiplier; // Calculation Logic var materialTotal = effectiveArea * materialRate; var removalTotal = area * removalRate; // Removal is based on physical footprint var baseLaborRate = effectiveArea * 2.50; // Average base installation labor var finalTotal = materialTotal + removalTotal + baseLaborRate; // Formatting document.getElementById("totalCost").innerText = "$" + finalTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById("matCostDisplay").innerText = "$" + materialTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById("remCostDisplay").innerText = "$" + (removalTotal + baseLaborRate).toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById("resultDisplay").style.display = "block"; }

Understanding the Costs of a New Roof

Replacing a roof is one of the most significant investments a homeowner can make. The cost is determined by several critical factors, primarily the size of the roof, the materials selected, and the complexity of the installation.

Key Factors in Roofing Estimates

  • Roof Square Footage: In the roofing industry, cost is often calculated per "square." One roofing square is equal to 100 square feet. Our calculator uses individual square feet for a more precise homeowner estimate.
  • Roof Pitch: The steeper the roof, the more surface area it has compared to the home's footprint. Steep roofs also require more safety equipment and labor, which increases the total price.
  • Material Selection: Asphalt shingles are the most common and affordable option, generally lasting 15-20 years. Materials like standing seam metal or natural slate offer significantly longer lifespans (50+ years) but come with a much higher upfront cost.
  • Removal and Disposal: If your current roof has multiple layers of old shingles, those must be stripped and hauled away. This labor-intensive process adds to the total disposal fees.

Example Calculation

If you have a 2,000 sq. ft. roof with a standard pitch and choose architectural shingles:

  1. Base Area: 2,000 sq. ft.
  2. Pitch Multiplier (Standard 6/12): 1.15x = 2,300 sq. ft. of material needed.
  3. Material Cost (Architectural): 2,300 * $6.50 = $14,950.
  4. Removal (1 Layer): 2,000 * $1.50 = $3,000.
  5. Labor: Approximately $5,000 – $7,000 depending on region.

By using this tool, you can visualize how changing materials—from basic asphalt to premium metal—impacts your bottom line before you ever call a contractor.

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