Home Loan Emi Calculator Floating Interest Rate

by

Roofing Replacement Cost Calculator

Flat / Very Low (0/12 – 2/12) Standard (3/12 – 6/12) Steep (7/12 – 9/12) Very Steep (10/12+)
Asphalt Shingles (Basic) – $4.50/sq ft Architectural Shingles – $6.50/sq ft Metal Roofing (Standard) – $11.00/sq ft Clay or Concrete Tile – $15.00/sq ft Natural Slate – $22.00/sq ft

Estimated Project Cost

*This is a rough estimate including labor and materials. Actual quotes may vary based on local rates and roof complexity.

function calculateRoofCost() { var area = parseFloat(document.getElementById('roofArea').value); var pitchMultiplier = parseFloat(document.getElementById('roofPitch').value); var materialCost = parseFloat(document.getElementById('materialType').value); var removeOld = document.getElementById('removeOld').checked; var resultArea = document.getElementById('resultArea'); var costDisplay = document.getElementById('costDisplay'); if (isNaN(area) || area <= 0) { alert("Please enter a valid roof area."); return; } // Calculations var effectiveArea = area * pitchMultiplier; var removalRate = removeOld ? 2.00 : 0; // Average removal cost per sq ft var totalCostPerSqFt = materialCost + removalRate; var totalEstimate = effectiveArea * totalCostPerSqFt; var rangeLow = totalEstimate * 0.9; var rangeHigh = totalEstimate * 1.1; costDisplay.innerHTML = "$" + rangeLow.toLocaleString(undefined, {minimumFractionDigits: 0, maximumFractionDigits: 0}) + " – $" + rangeHigh.toLocaleString(undefined, {minimumFractionDigits: 0, maximumFractionDigits: 0}); resultArea.style.display = "block"; // Scroll to result resultArea.scrollIntoView({ behavior: 'smooth', block: 'nearest' }); }

How to Estimate Your Roof Replacement Cost

A new roof is one of the most significant investments a homeowner can make. Understanding the variables involved helps you budget effectively and evaluate contractor quotes with confidence. Our calculator uses four primary factors to determine your estimate:

1. Total Square Footage

In the roofing industry, cost is often discussed in "squares." One roofing square equals 100 square feet. It is important to remember that your roof's square footage is always greater than your home's interior square footage due to overhangs and the slope of the roof.

2. Roof Pitch and Complexity

The "pitch" refers to the steepness of your roof. Steep roofs (anything over a 6/12 pitch) require more safety equipment, take longer to install, and require more materials to cover the same footprint as a flat roof. Complexities like chimneys, skylights, and multiple valleys also increase labor costs.

3. Materials Matter

Material choice is the biggest variable in your total cost:

  • Asphalt Shingles: The most common and cost-effective option, lasting 15-30 years.
  • Metal Roofing: Extremely durable (50+ years) and energy-efficient, but carries a higher upfront cost.
  • Slate and Tile: Premium materials that offer unmatched aesthetics and longevity but require structural reinforcement due to their weight.

4. Removal and Disposal

Removing the existing layers of shingles (tear-off) adds labor time and disposal fees. While some local codes allow for a "roof-over" (adding new shingles over old ones), most professionals recommend a full tear-off to inspect the underlying roof deck for rot or damage.

Example Calculation

For a 2,000 sq. ft. roof with a standard pitch using Architectural Shingles and removal of the old roof:
• Effective Area: 2,000 x 1.15 = 2,300 sq. ft.
• Cost per sq. ft: $6.50 (Material) + $2.00 (Removal) = $8.50
• Total Estimated Cost: $19,550

Additional Cost Considerations

When getting professional quotes, be sure to ask if the following are included:

  • Underlayment: The water-resistant barrier between the shingles and the wood deck.
  • Flashing: Metal pieces installed around chimneys and vents to prevent leaks.
  • Ventilation: Proper attic venting (ridge vents or soffit vents) to prolong roof life.
  • Permits: Local building department fees.

Leave a Comment