Business Loan Repayment Calculator

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Professional Roofing Cost Estimator

Asphalt Shingles (Basic) Architectural Shingles Metal Roofing Clay/Concrete Tiles Natural Slate
Flat or Low Slope (0-3/12) Standard Pitch (4/12 – 7/12) Steep Pitch (8/12 – 12/12) Very Steep (>12/12)
Overlay (No removal) Single Layer Removal Double Layer Removal

Estimated Project Total:

Material Cost:

Labor & Complexity Adjustment:

Removal Cost:

*This estimate includes base materials, standard labor, and selected options. Local permit fees and structural repairs are not included.

function calculateRoofCost() { var area = parseFloat(document.getElementById('roofArea').value); var materialPrice = parseFloat(document.getElementById('materialType').value); var pitchMultiplier = parseFloat(document.getElementById('roofPitch').value); var removalRate = parseFloat(document.getElementById('tearOff').value); if (isNaN(area) || area <= 0) { alert("Please enter a valid roof surface area."); return; } var baseMaterialTotal = area * materialPrice; var laborAndComplexity = (baseMaterialTotal * pitchMultiplier) – baseMaterialTotal; var removalTotal = area * removalRate; var grandTotal = baseMaterialTotal + laborAndComplexity + removalTotal; document.getElementById('totalDisplay').innerText = "$" + grandTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('matCost').innerText = "$" + baseMaterialTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('labCost').innerText = "$" + laborAndComplexity.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('remCost').innerText = "$" + removalTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById('roofResult').style.display = 'block'; }

Understanding Your Roofing Estimate

Replacing a roof is one of the most significant investments a homeowner can make. Our Roofing Cost Estimator is designed to provide a realistic baseline for your project budget. While many "per square" (100 sq. ft.) estimates are generic, this tool accounts for specific architectural complexities that impact local contractor quotes.

Key Factors Influencing Roof Costs

  • Roofing Material: Asphalt shingles are the most common and affordable, while materials like slate or tile offer longevity but require significant structural support and higher labor costs.
  • Pitch and Slope: Steeper roofs (above 7/12 pitch) require specialized safety equipment and take longer for crews to navigate, increasing the labor portion of the bill.
  • Roof Tear-Off: Removing one or two existing layers of shingles adds labor time and disposal fees (dumpster rentals and landfill charges).
  • Roof Squares: In the roofing industry, a "square" is 100 square feet. This tool uses total square footage for higher precision.

Realistic Project Example

If you have a 2,000 sq. ft. roof and choose Architectural Shingles ($8.00/sq.ft. installed), a Standard Pitch, and require Single Layer Removal ($1.50/sq.ft.):

Step 1: Base Material = 2,000 × $8.00 = $16,000
Step 2: Pitch Adjustment = ($16,000 × 1.15) – $16,000 = $2,400
Step 3: Removal = 2,000 × $1.50 = $3,000
Estimated Total: $21,400

How to Get the Best Quote

Always solicit at least three quotes from licensed and insured contractors. Ensure your quotes include flashing replacement, underlayment type (synthetic is preferred), and a clear warranty on both materials and workmanship. Be wary of estimates that are significantly lower than others, as they may indicate a lack of insurance or poor-quality materials.

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