Compare Roof Quotes on the Same Scope
Two roof quotes $2,000 apart often cover different jobs. Enter what each written quote includes and this puts them on the same scope, so you can see which is actually lower and what to ask before you sign.
Compare your roof quotes side by side
Type what each written quote says. Untick anything a quote leaves out or only covers vaguely, and enter the price that roofer gives you to add it. We put every quote on the same scope. Nothing you type leaves your browser.
Why two quotes for the same roof differ
- Decking. One roofer includes a few sheets; another bills every sheet at a unit price. For illustration: a $12,000 quote with five sheets included versus an $11,500 quote at $125 a sheet with none included. If five sheets are needed, the "cheaper" quote is $12,125.
- Different measurements. Square counts that differ by more than a few percent mean different waste factors or a different reading of the roof. Price per square only means something once the sizes match.
- Vague scope. "Ice and water shield included" without locations or linear feet, or "flashing as needed", can't be compared to a quote that lists them. Ask for the specifics in writing.
- Allowances aren't good or bad by themselves. An undefined allowance just makes the final price harder to predict.
Line by line, what each item means is in your roofing estimate, explained. To check whether the totals are in a sensible range for your house, run the roof cost estimate by address.
How the comparison works. Same-scope total = quoted total + (decking sheets planned − sheets included) × that quote's per-sheet price + the price you entered for each unticked item. An unticked item with no price is listed as unpriced, and that quote is left out of "lowest" until you fill it in. We don't insert national averages for missing items; only the roofer's own price makes the comparison fair.
Sources
- Federal Trade Commission, consumer advice on hiring a contractor (get at least three written estimates and a written contract), via The Roofing List, How to compare roofing estimates, which also summarizes NRCA's guidance that proposals identify materials, scope, schedule, payment and warranty, and the decking-allowance example above.
- Local Roofing Help, How to Read a Roofing Estimate (Line by Line) (typical 0–4 replacement sheets, per-sheet rate, ice barrier coverage under IRC R905.1.2).
Accessed November 9, 2026. General planning information, not contracting or legal advice.
Frequently asked questions
How do I compare roofing quotes?
Compare line items, not totals. Make sure each quote measures the same number of squares, then add each roofer's price for the same number of replacement decking sheets and the price of anything the quote leaves out, such as ice and water shield, drip edge, flashing or the permit. Compare those same-scope totals and the price per square.
Why is one roofing quote so much cheaper?
Usually because it covers less: fewer decking sheets included, no per-sheet price, reused flashing or drip edge, less ice and water shield, or a smaller measured roof. Put the quotes on the same scope before deciding it is a better deal.
How many decking sheets should a roof quote include?
There is no standard. Many re-roofs need zero to four 4×8 sheets, and roofs with past leaks can need many more. What matters is that the quote states a price per extra sheet and how damaged sheets will be documented before they are replaced.
How many roofing quotes should I get?
The FTC suggests at least three written estimates for home improvement work. Three also gives you enough to spot a measurement or scope outlier.
Last reviewed 2026-11-09. Results are estimates for planning; confirm quantities with your supplier and requirements with your local building code and the manufacturer's instructions.