Tool 12 / 12
Roof Estimate Comparison Tool
Photograph 2 or 3 written estimates and get a side-by-side breakdown of price per square, scope, warranties, and red flags, plus the questions to ask each contractor.
The comparison is AI-generated guidance for your own review, not professional or legal advice, and it never recommends a specific company. Verify every extracted number against your paper estimates. Some links in the report go to other sites in our family of roofing properties, and they are labeled as such. Full disclaimer.
What this tool actually does
You photograph two or three written estimates, and the tool reads each one: contractor name, total price, roof size if stated, materials, scope lines, warranty terms, and payment terms. Then it puts them side by side, computes price per square where it can, flags the spread between the highest and lowest bid, and lists the scope differences that explain the gap. It finishes with specific questions to ask each contractor. It does not pick a winner, because a photo of paperwork cannot see your roof.
Why estimates are so hard to compare by hand
Roofing estimates have no standard format. One contractor bids by the square, another lumps everything into a single number, a third itemizes 30 lines including every pipe boot. The result is that homeowners end up comparing totals when they should be comparing scope. A $12,000 bid that includes tear-off, new flashing, synthetic underlayment, ice and water shield at the eaves, and a workmanship warranty is a different product from a $9,500 bid that reuses flashing and never mentions disposal. Same roof, different jobs.
The comparison that matters is three layers deep: the normalized price (dollars per square), the scope (what is physically being installed and removed), and the paper (warranty terms, payment schedule, insurance, permit responsibility). This tool structures all three layers so the differences are visible instead of buried in formatting.
How to use the report
- Check the extraction first. The report shows what it read from each document with a confidence level. If a number looks wrong, retake the photo in better light and run it again.
- Look at the spread. Bids within 10 to 15 percent of each other are normal market variation. A 30 or 40 percent spread means the contractors are not bidding the same scope, and the scope table will usually show you where.
- Ask the generated questions. Each question ties to a real difference between the bids. How a contractor answers a specific, informed question tells you more than any online review.
- Sanity-check the price range. Run your roof through our cost estimator to see whether all the bids are high, all low, or centered where your state and roof size say they should be.
What it will not do
It will not tell you which contractor to hire, it will not negotiate for you, and it cannot detect work quality from paperwork. A beautifully written estimate can precede a sloppy roof, and a two-line estimate can come from the best crew in the county. Use the comparison to have sharper conversations, collect references, and verify insurance and license status before signing anything.
FAQ
Frequently asked questions
How do I compare two roofing estimates that look completely different?
Normalize them to price per square (100 square feet), then line up what each one actually includes: tear-off, underlayment type, ice and water shield, flashing replacement versus reuse, ventilation, permit, and disposal. Most "cheap" bids are cheap because a line item is missing, not because the labor is discounted. This tool does that normalization for you from photos of the paperwork.
Is the cheapest roofing estimate usually the best one?
No, and neither is the most expensive. A bid far below the others usually left something out or assumes reusing flashing and skipping permits. A bid far above should come with a concrete reason, like extensive decking replacement or a premium warranty. The useful move is asking each contractor to explain the specific differences, which is exactly the question list this tool generates.
What red flags should I look for in a roofing estimate?
Vague scope lines like "install new roof" with no material names, no tear-off or disposal line, "reuse existing flashing" on an old roof, no permit mentioned, a required deposit above roughly a third, and no workmanship warranty in writing. Any one of these is a conversation; several together is a pattern.
Does this tool store my estimates or my personal information?
No. The photos are processed in memory to extract the numbers and scope, and they are not saved. You do not need an address or a phone number to run a comparison. Providing an email at the end is optional.
How accurate is an AI reading of a photographed estimate?
Good enough to structure the comparison, not good enough to replace your own eyes. Every number in the report comes from your paperwork, so verify the extracted prices against the originals before you act on the comparison. The tool tells you its confidence for each document and never invents numbers it cannot read.