How It Works
Three simple steps to get accurate calculations
1
Enter Roof Size
Input the number of squares and your price per square.
2
Add Material Costs
Include shingles, underlayment, ice & water shield, and flashings.
3
Factor In Labor & Fixed Costs
Set crew daily rate, job duration, dumpster, and permits.
4
Analyze Profitability
Review suggested bid, actual margin, and upgrade upsell impact.
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Frequently Asked Questions
What should roofers charge per square?
Residential asphalt shingles: $350-550/square installed. Architectural shingles: $400-600/square. Premium/designer: $600-900/square. Prices vary by region, pitch, access, and tear-off layers. Always calculate your actual costs.
How do I calculate roofing materials cost?
Materials typically: Shingles ($100-150/sq), Underlayment ($15-40/sq), Ice & water ($1-2/LF at eaves), Ridge vent ($3-5/LF), Flashing/vents ($200-600 total). Add 10% waste factor. Materials = 40-50% of typical bid.
What profit margin should roofing contractors target?
Target 25-35% gross profit margin on residential re-roofs. After overhead, net 10-18%. New construction is typically 20-25% gross due to volume. Below 20% gross margin, you're likely not covering true overhead.
Should I upsell synthetic underlayment?
Yes - synthetic underlayment costs $20-40/square more than felt but provides better protection and faster install. Charge $30-60/square premium. On a 25-square roof, that's $750-$1,500 additional revenue for ~$500 more cost. Easy profit boost.
How do I price steep or complex roofs?
Add 15-25% for 8/12 to 10/12 pitch, 30-50% for steeper. Cut-up roofs with many valleys/hips add 10-20%. Limited access (fence, landscaping) adds 5-15%. Always walk the roof and measure carefully before bidding.
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Results are estimates for informational purposes only. Consult professionals for important decisions.