Roofing Cost Calculator
/* Calculator Styles */
.calc-container {
max-width: 800px;
margin: 20px auto;
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
border: 1px solid #e0e0e0;
border-radius: 8px;
box-shadow: 0 4px 12px rgba(0,0,0,0.05);
background: #fff;
overflow: hidden;
}
.calc-header {
background-color: #2c3e50;
color: white;
padding: 20px;
text-align: center;
}
.calc-header h2 {
margin: 0;
font-size: 24px;
}
.calc-body {
padding: 30px;
display: flex;
flex-wrap: wrap;
gap: 30px;
}
.calc-inputs {
flex: 1;
min-width: 300px;
}
.calc-results {
flex: 1;
min-width: 300px;
background-color: #f8f9fa;
padding: 20px;
border-radius: 6px;
border: 1px solid #dee2e6;
display: flex;
flex-direction: column;
justify-content: center;
}
.form-group {
margin-bottom: 20px;
}
.form-group label {
display: block;
font-weight: 600;
margin-bottom: 8px;
color: #333;
}
.form-group input, .form-group select {
width: 100%;
padding: 10px;
border: 1px solid #ccc;
border-radius: 4px;
font-size: 16px;
box-sizing: border-box; /* Fix padding issues */
}
.form-group .hint {
font-size: 12px;
color: #666;
margin-top: 4px;
}
.calc-btn {
width: 100%;
padding: 12px;
background-color: #e67e22;
color: white;
border: none;
border-radius: 4px;
font-size: 18px;
font-weight: bold;
cursor: pointer;
transition: background-color 0.3s;
}
.calc-btn:hover {
background-color: #d35400;
}
.result-row {
margin-bottom: 15px;
border-bottom: 1px solid #e0e0e0;
padding-bottom: 10px;
display: flex;
justify-content: space-between;
align-items: center;
}
.result-row:last-child {
border-bottom: none;
margin-bottom: 0;
}
.result-label {
color: #555;
font-size: 14px;
}
.result-value {
font-weight: 700;
font-size: 18px;
color: #2c3e50;
}
.total-cost {
font-size: 28px;
color: #e67e22;
}
/* SEO Article Styles */
.seo-content {
max-width: 800px;
margin: 40px auto;
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
line-height: 1.6;
color: #333;
}
.seo-content h2 {
color: #2c3e50;
border-bottom: 2px solid #e67e22;
padding-bottom: 10px;
margin-top: 40px;
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.seo-content h3 {
color: #34495e;
margin-top: 30px;
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.seo-content p {
margin-bottom: 15px;
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.seo-content ul {
margin-bottom: 20px;
padding-left: 20px;
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.seo-content li {
margin-bottom: 8px;
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.faq-box {
background-color: #f1f1f1;
padding: 20px;
border-radius: 6px;
margin-bottom: 20px;
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.faq-question {
font-weight: bold;
color: #d35400;
margin-bottom: 5px;
}
Estimated Roof Size:
0 sq ft
Material Cost:
0.00
Labor & Installation:
0.00
Removal/Disposal:
0.00
TOTAL ESTIMATE:
$0.00
*Estimate includes 10% waste factor. Prices vary by region.
2024 Roof Replacement Cost Guide
Planning a roof replacement is a significant home improvement project. Understanding the breakdown of costs—from materials like asphalt shingles or metal to the labor involved in steep-slope installation—is crucial for budgeting effectively. Our Roofing Cost Calculator helps you estimate the investment required based on your home's specific footprint and material choices.
Factors That Influence Roofing Costs
When calculating the price of a new roof, contractors consider "squares" rather than just square footage. One "square" equals 100 square feet of roof area. Here are the primary factors that drive the total price:
1. Roof Size and Pitch
A larger roof naturally requires more material, but the "pitch" (slope) is equally important. Steep roofs are more dangerous and difficult to work on, requiring special safety gear and slower installation times. This increases the labor multiplier significantly.
2. Material Selection
Your choice of material is the biggest variable:
- Asphalt Shingles: The most common and affordable option, typically costing between $450 and $600 per square installed.
- Metal Roofing: Durable and energy-efficient, but costs can range from $900 to $1,200 per square.
- Tile or Slate: Premium materials that can last 50+ years but often cost over $1,500 per square due to weight and installation complexity.
3. Tear-Off and Disposal
Layering a new roof over an old one saves money upfront but can hide structural damage. A full "tear-off" involves removing old shingles and felt, which adds labor and dumpster disposal fees, usually averaging $100-$200 per square.
Frequently Asked Questions
How do I calculate my roof area from my floor plan?
Your roof area is always larger than your home's floor footprint due to overhangs and the slope. A common rule of thumb is to multiply your home's footprint by a pitch factor (e.g., 1.15 for standard slopes or 1.35 for steep slopes) and add 10% for waste.
Is it better to tear off the old roof or layer over it?
While most building codes allow for two layers of shingles, professional roofers highly recommend a full tear-off. This allows inspection of the roof deck (plywood) for rot or water damage, ensuring the new roof has a solid foundation.
What is a "Square" in roofing terms?
Roofers do not price by the single square foot. They use the term "Square," which equals a 10-foot by 10-foot area (100 square feet). If your roof is 2,000 sq ft, that is 20 Squares.
function calculateRoofCost() {
// 1. Get Inputs
var footage = parseFloat(document.getElementById("houseFootage").value);
var pitchMultiplier = parseFloat(document.getElementById("roofPitch").value);
var materialCostPerSquare = parseFloat(document.getElementById("roofMaterial").value);
var isTearOff = parseInt(document.getElementById("tearOff").value);
// Validation
if (isNaN(footage) || footage 1.15, add 20% to labor portion.
// Assuming labor is ~40% of the base installed rate.
var laborPortion = baseInstalledRate * 0.40;
var pitchSurcharge = 0;
if (pitchMultiplier > 1.15) {
pitchSurcharge = laborPortion * 0.25; // +25% labor cost for steep roofs
}
var finalRatePerSquare = baseInstalledRate + pitchSurcharge + tearOffCostPerSquare;
var grandTotal = squares * finalRatePerSquare;
// Breakdowns for display
var displayMaterial = (baseInstalledRate * 0.60) * squares; // Approx 60% is material
var displayLabor = ((baseInstalledRate * 0.40) + pitchSurcharge) * squares;
var displayTearOff = tearOffCostPerSquare * squares;
// 3. Update DOM
document.getElementById("resRoofSize").innerHTML = Math.round(actualRoofArea).toLocaleString() + " sq ft (" + Math.ceil(squares) + " Squares)";
document.getElementById("resMaterial").innerHTML = "$" + displayMaterial.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById("resLabor").innerHTML = "$" + displayLabor.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById("resTearOff").innerHTML = "$" + displayTearOff.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
document.getElementById("resTotal").innerHTML = "$" + grandTotal.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2});
}